Polymer Processing Institute

Contact: Sales Manager

218 Central Ave
Newark, NJ 07103-3918
U.S.

Phone: 973-596-3267
Fax: 973-642-4594

Website

E-mail

The Polymer Processing Institute is an independent research corporation headquartered at New Jersey Institute of Technology, Newark, NJ USA. Its mission is to assist industry by implementing the advanced knowledge in the field of polymer technology and related areas through sponsored research, development and education, and to disseminate information via technology transfer. PPI is involved in extension activities for the plastics industry (through the New Jersey Manufacturing Extension Program), edits its own journal, "Advances in Polymer Technology", edits and authors its own Monograph Series, organizes meetings for member companies on generic aspects of polymer processing, offers training opportunities and advanced-level short courses for engineers and scientists in the industry, and supports the education and research needs of graduate and undergraduate students.

PPI's human resources include a technical staff of more than 15 professionals and renowned associated consultants. Governed by a distinguished board of trustees, PPI enjoys a close working relationship with its Corporate members which include the largest and most prestigious international corporations in the polymer industry. With the arrival of Dr. Kun Sup Hyun as President, after a successful industrial R&D career from The Dow Chemical Company, on Feb. 1st, 2001, the Institute is available for consulting major companies how to set up a successful leveraging group in polymer processing in the companies as he had demonstrated at Dow for the last 12 years.

PPI? main research focus is the modification of polymers through processing into special property, high-value products that are suitable for the medical, health care, automotive, electronics, construction, and packaging industries. Other research initiatives include nanocomposites and conducting polymer systems, the development of on-line process/ product monitors PPI's special area of expertise is the development of appropriate polymer processing operations, including reactive processing and microstructure development by compounding and thermoplastic extrusion foam processing to obtain high performance materials and products. These activities are supported by excellent facilities in property characterization, in-and on-line process monitors and computer modeling. PPI's Process and Characterization Labs and Computation Center are very well equipped, up-to-date and professionally managed. The flexible Process Labs contain virtually all important extrusion, compounding and injection molding machines, Single and Twin Mixing Element Evaluators and a multitude of in-house on-line process monitors.

PPI's research services encompass generic, multi-client and proprietary contract research associated with the development of polymer products and processes. The computer services include packaged software for single screw extrusion and die design and property analysis (WinSSDª), as well as materials and process data banks and custom software development as well as co-development.

The headquarter of the Polymer Processing Institute (PPI) was moved from Stevens Institute of Technology to the New Jersey Institute of Technology (NJIT) on January 1, 1999. The move took place after sixteen years at Stevens, where PPI was founded in 1982. The move to NJIT served PPI? need for a large, contiguous polymer processing laboratory space, which is provided for by the factory floor facility in the Guttenberg Information Technology Center (GITC) building.

PPI remains an independent, not-for-profit research corporation, whose mission is to work with industry to advance knowledge and technology in the field of polymer processing and related areas. This mission is carried out through sponsored research, development, education and publication of its journal Advances in Polymer Technology, a Monograph Service with Hanser as well as presenting the results of generic research in technical meetings and in papers published in technical journals.

PPI first linked with NJIT in 1995 when our Director of Research, Marino Xanthos, joined the NJIT chemical engineering faculty, revitalizing the university's polymer program.?In the first five years PPI has been a partner of the Multi-lifecycle Engineering Research Center program at NJIT, funded by the NJ Commission of Science and Technology.

At NJIT, PPI works very closely with the Center for Manufacturing Systems (CMS) and the New Jersey Manufacturing Extension Partnership (NJMEP), an independent not-for-profit organization dedicated to assisting small and medium size New Jersey Manufacturers. Both PPI and CMS serve as technical service providing partners of NJMEP.

PPI was also a participant in the NJIT Polymer Engineering Center (PEC), which served as the home for academic faculty research in Polymer Engineering.?PPI's equipment and technical personnel are available to the faculty and graduate students conducting research in Polymer Engineering. PPI? research labs are used for undergraduate and graduate laboratory instruction. The Director of the PEC was Professor Xanthos who now serves as Chair of the Executive Committee for the Council of Material Science and Engineering.?Even though PEC is dissolved, PPI now facilitates the previous PEC function.

PPI? move to NJIT extended the university? ability to address industrial development need and catalyzes cross-disciplinary research and educational programs with NJIT in the field of polymer engineering and science.

On the other hand, as an established public research university with a mission of economic development and service, NJIT is providing PPI with a broad technology base. Dr. Hyun, and Dr. Todd are Research Professors and Dr. Gogos is Distinguished Research Professor in the Otto H. York Department of Chemical Engineering facilitating the interaction between NJIT and PPI.


The Polymer Processing Institute has had a long history of research in reactive processing.?Much of the contract research for industries is of the work conducted in one of three main categories:

* Reactive Compatibilization

* Create Stable Morphologies in Polymer Blends and Composites
* Improve Mechanical and Thermal Properties

* Monomer Grafting to a Polymer Backbone

* Add Functionality/Polarity to Polymer Chains
* Grafted Polymer to be used as a Compatibilizer for Polymer Blends/Composites

* Polymerization Reactions

* Addition as well as Condensation Types
* Homo and Co polymerizations.?Up to Four Monomer Components have been Investigated
* Typical Goal is to Perform Polymerizations in Continuous Processing Equipment.?Extrusion Equipment Primarily but not Exclusively Used


A systematic approach is used to determine the feasibility of a Reactive Polymer System.?The Process/Product Development project is custom designed on a case by case basis.?A typical approach is to investigate the system on a small-scale batch wise basis, then incorporate the information gained to pilot scale continuous equipment.?PPI has an extensive processing laboratory of pilot sized equipment which includes:

* Batch mixers
* Extruders; Single and Twin Screw, Co-and Counter-rotating, Intermeshing and Non-intermeshing
* Continuous Stirred Tank Reactors;?to be used as Prereactors or for Complete Polymerizations
* Liquid Metering Pumps; Capable of Pumping at High Pressures and Low Flow Rates
* Jacketed Pumps, Lines, and Feed Ports to Control Component Temperature

Process laboratory is complemented by an extensive Polymer Characterization Laboratory.

Foam Research Capabilities at PPI

1. Batch Foaming Apparatus
2. Measurement of Solubility of Physical Blowing Agents in Polymers

* Off-Line Measurement
* In-Line Measurement

3. Single screw extrusion set-up for?igh and Medium Density Foams
4. Tandem Extruders Set-up for Low Density Foams
5. Co-extrusion of A-B-A or A-B-C-B-A Structure (B - Foamed Layer)
6. Process Development for Expanded Beads molding
7. Developed Technology for Foaming HDPE, LDPE, PP, PS, Rigid PVC, PUR, PET and thermoplastic elastomers by gas or liquid injection
8. Foam Characterization

* Closed vs. Open Cell
* Mechanical Characteristics
* Thermal Properties

4. Rheological characterization for Foamability
5. Computer Simulation

* Plasticating and Mixing Screw Design
* Cooling Screw Design
* Die Design

4. Developing Knowledge Base for Scale-up



For more information please contact
Dr. Marino Xanthos
(973) 642-4585

Sample Contract Research Projects

* Polymer Mixing Study
* Development of engineering thermoplastic blends for electronic applications
* Development of degradable polymers for marine applications
* Compounding and characterization of flake and fiber reinforced thermoplastics
* Morphology development of crosslinkable elastomer blends in twin screw extruders
* Preparation of conductive and lubricated thermoplastics by extrusion compounding
* Formulation and processing of highly filled metal powder thermoplastics
* Filler surface treatment with adhesion promoters and product evaluation
* Compounding of highly filled, high temperature engineering thermoplastics
* Extrusion reprocessing and compatibilization of recycled marine plastics
* Devolatilization of polymer melts in single and twin screw extruders
* Development of on-line FTIR analysis of melt extrudate composition
* Morphology development in polyblends in relation to processing history
* Think tank analysis of new and novel processes for manufacture of existing commercial product

Process Development

* Protocol of ingredient incorporation consequences
* Determination of interacting effects on microstructure development as affected by:

* Screw geometry
* Processing conditions
* Polymer properties

* Determination of melting mechanisms
* Develop knowledge base for scale-up

Computer Simulation

* Plasticating and Mixing Screw Design

Equipment

* Segmented Twin Screw Extruders
* Intermeshing Co-Rotating (15, 30, 34 mm)
* Clam Shell TS Mixing Element Evaluator (30 mm)
* Intermeshing Counter Rotating (34 mm)
* Tangential Counter Rotating (20 mm)
* Segmented Single Screw Extruder (32 mm)
* Heat Transfer Extruder (40 mm)
* Conventional Single Screw Extruders (19, 25, 50 mm)

Characterization

* On-line optical flow cell for blends and dispersions
* On-line rheology

* Helical Barrel Rheometer (PPI Patent)
* Rheometrics Melt Flow Monitor

* Off-line physical, thermal property meas
Design and Simulation Services

WinSSDª | PASS/DFC |

PPI? Computation and Information Technology Division provides confidential consulting services for the design, analysis, and optimization of polymer processes in single screw extruders and extruder dies; viscoelastic flow; mixing in processing equipment; and two- and three-dimensional isothermal and non-isothermal flow. Additionally, PPI has studied: design of multi-layer spiral dies; optimization of cooling extruders; viscous heating in mixers; viscoelastic flow in journal bearings; flow balancing of profile dies; and optimization of single screw extruders using response surface methodology.

Single Screw Designer software package ?WinSSDª

The Polymer Processing Institute? WinSSDª Software Package can be used for the design, performance analysis, trouble shooting, scale-up, and optimization of single screw extrusion processes. Over 30 industrial companies throughout the world use the WinSSDª ?formerly known as PASS. The new Single Screw Designer Software is now fully Microsoft Windows 95 and Windows NT compatible. Figure 7 highlights the common dialog box data entry system that enhances the speed and ease of use of the WinSSDª. The WinSSDª supports both English and SI units systems. A simple button allows you to quickly change between unit systems. Figure 8 shows how the Results Analysis option may be used to view both graphically and numerically the results of the single screw simulations. The user interface or "librarian" for the resin database of "library" is show in Figure 9. The package consists of three librarians which allow you to manipulate resins, screw designs, and run orsummate result librarian. The new resin material property parameter estimation utility is shown in Figure 10 for the Resin Rheology Option.?

The package will run on a 386, 486, Pentium, or Pentium II personal computer with a math co-processor and at least 8 megabyte of RAM and 15 megabytes of hard disk space.
Please Click here to view a Demonstration of the Program
(The demonstration will appear in a new window)

Die Flow Collection Software Package- PASS/DFC

Design and simulation of Mandrel pipe, and Coat-hanger dies can be performed using the PASS/DFC, PASS/DFC. Can perform non-isothermal non-Newtonian analysis of the flow within dies. Numerical methods are used to calculate transverse shear, velocity and temperature profiles as well as axial pressure, temperature, shear stress and heat transfer distributions. Die geometry is specified using and integral die editor. The design is drawn as each section specified. No previous CAD experience is required.
For more information, please contact
Dr. Jason (Jianxin) Guo
(973) 596-5255
jguo@polymers-ppg
?Polymer Characterization

Complete materials characterization for injection molding and extrusion simulation for most commercial software:

* Rheological properties using Capillary Rheometer: with or without entrance pressure correction
* Thermal properties, specific heat and heat of transition, by Differential Scanning Calorimeter
* Solid & Melt density measurements at various temperatures and pressures
* Thermal conductivity and diffusivity of solid and melt

Rheological characterization

* Dynamic Mechanical Spectrometer using Rheometric Scientific RMS-800
* Melt Elasticity evaluation using Melt Elasticity Indexer
* Melt Index and Melt Flow Rate measurements as per ASTM D-1238

Evaluation of polymer blends (mixing and compatibility)

* Brabender Intensive Mixer
* Optical microscopy and hot stage
* On-line morphology monitoring
* Scanning Electron Microscopy (Digital, Low Voltage, FEG)
* Transitions of polymers by dynamic torsion

Evaluation of electrical properties

* Dielectric properties
* Surface and volume resistivity for EMI shielding

Mechanical Properties

* Tensile properties as per ASTM D-638 and other temperatures
* Flexural properties as per ASTM D-680
* Gardner Impact as per ASTM D-3029 and D-4226
* Izod/Charpy impact test as per ASTM D-256

Residual Stress Analysis:

* Polarizing microscope
* Stress birefringence measurements

Thermal Properties of Polymers:

* Heat of transitions by Differential Scanning Calorimeter DSC-7
* Thermal stability by Thermogravimetric Analysis TGS-2

Materials and Additives Analysis:

* Fourier Transform Infra-Red analysis
* FTIR Spectral library
* Energy dispersive X-Ray Spectroscopy with surface mapping

Molecular Weight and Molecular Weight Distribution:

* High Temperature Gel Permeation Chromatography
* Solution Viscosity

For more information, please contact
Dr. Victor Tan
(973) 242-6788
victor@polymers-ppi.org

PPI has a long history of helping its clients in the pharmaceutical industry with respect to various problems related to medical devices/pharmaceutical packaging made out of polymeric materials. Such problems may include micro scale contamination of surfaces, surface reactions of plastic products with contained reagents, uneven distribution of various organic and/or metallic additives/catalysts in polymer matrix, anisotropy of mechanical properties of plastic parts with different orientation, molding defects, etc. PPI's capabilities and resources include, besides wet chemistry, Scanning Electron Microscopy (SEM)/ EDS (Energy Dispersive X-Ray Spectroscopy) including surface mapping, FTIR spectroscopy including fixed angle specular reflectance combined with a wide range of spectral libraries ( a dozen) containing several thousand spectra for unknown identification. PPI also can render help in materials selection and products design/processing for specific applications.
?
For more information, please contact
Dr. Subhash Patel
(973) 596-3566
subhash@polymers-ppi.org

Dr. Ted Davidson
(973) 642-4582
tdavidson@polymers-ppi.org

Adhesives Technology

There is increasing recognition of advantages to adhesive bonding for joining components whatever the base material.?We fly on airplanes made with adhesively bonded structures.?Stress concentrations inherent to bolts and rivets are eliminated with adhesive joints.?Cost effective methods are at hand for production bonding of assemblies.?In all of these technologies, PPI is ready to help its clients to make the most effective and productive use of adhesives.

Our experience includes:

* Rheology and formulation of hot melts
* Process Engineering for adhesive compounding and manufacture
* Novel curing technologies
* Tie layer and multilayer laminates
* Surface engineering of adherends
* Adhesives for medical applications

For more information, please contact
Dr. Subhash Patel
(973) 596-3566
subhash@polymers-ppi.org

?Dr. Ted Davidson
(973) 642-4582
tdavidson@polymers-ppi.org

Plastic Packaging

PPI offers industry the opportunity to improve plastics processing and products for packaging applications through factory automation and advanced engineering and manufacturing techniques. Research and development capabilities are as follows:

* Develop and build a knowledge base of processing and performance/cost characteristics for semicrystalline, heat set, and amorphous thermoplastic polymeric materials, such as polyesters, polypropylene, polyethylene, and polystyrene resins
* Develop and design advanced process and product technology for commercial scale-up of plastic packaging
* Selection of optimum plastic materials based on end-user cost and performance requirements
* Prototype part design/development of monolayer and multi-layer packaging
* Design and produce innovative packaging products through formulation and compounding technology
* Develop sheet and thermoformed packages using both plant scrap and post-consumer recycled (PCR) resins as major components of multi-layered structures for applications requiring environmentally friendly packaging
* Rapid Prototyping Laboratory provides Finite Element Analysis and Computer Aided Design (CAD). The latter can be directly coupled to stereolithography which can produce a packaging model within a day.

For more information, please contact
?Dr. Kun Sup Hyun
(973) 596-3267
kshyun@polymers-ppi.org

Plastics Recycling

Over the past 15 years, PPI has developed a considerable expertise in the area of plastics recycling particularly in the application of new reactive extrusion, compatibilization and biodegradation modification technologies for single and commingled streams.?Research work has been conducted for several governmental agencies (US DOE, NJ Commission of Science and Technology, Department of Commerce) and for a great number of individual companies.?

Some waste streams for which new products and applications were sought include:?

* municipal mixed post-consumer plastics
* automotive shredder residue
* wire and cable coatings
* carpets
* discarded or obsolete fishnets

PPI's expertise spans a broad range of process and product development with modified plastics waste streams and resulted in a significant number of publications, a monograph and a US Department of Energy sponsored study on "Assessment of Technologies for Plastics Recycling".

For more information, please contact
Dr. Marino Xanthos
(973) 642-4585
marino@polymers-ppi.org

PPI has developed on-line devices that monitor Morphology and Rheology in real-time for better process control

Flow cell lets you monitor the morphology of blends in real-time using an optical microscope mounted on a high temperature visualization device?
Helical Barrel Rheometer is an instrument that measures the viscosity of polymers on-line and under real processing conditions
?For further information please contact:

Dr. Kun Sup Hyun
(973) 596-3267
kshyun@polymers-ppi.org
?Dr. David B. Todd
(973) 596-5602
david@polymers-ppi.org

Failure Analysis

PPI has been helping its clients in failure analysis of polymers and composite parts in terms of material selection/ material characteristics, product design and processing. The types of analysis may involve mode of failure, time dependent failure, failure under impact, material aspects such as distribution of additives, morphology development in multiphase systems, degree of crystallinity and crystal structure, anisotropy due to processing, and degree of curing in reactive systems.?

PPI's resources include?

* Scanning Electron Microscopy (SEM)
* Optical microscopes
* Image analysis
* Energy Dispersive X-Ray Analysis (EDS)
* Mechanical testing devices
* Impact testers
* Mechanical spectrometer.

For more information, please contact
Dr. Theodore Davidson
(973) 642-4582
tdavidson@polymers-ppi.org
Dr. Victor Tan
(973) 242-6788
victor@polymers-ppi.org

Process and Product Development

PPI has the expertise for developing processes involving any of the steps of melting, mixing, reacting, blending and devolatilizing in the preparation of polymer formulations. A classic example is the conversion of a solvent based terpolymerization formerly carried out in large stirred batch kettles into a continuous solvent-free process utilizing a small continuous stirred tank prereactor in conjunction with a twin screw extruder for final conversion and devolatilizing of any unreacted ingredients.

Consequences of changing extruder screw configuration or operating conditions, or varying the protocol of addition of ingredients in formulation of blends or in reactive extrusion can be fully evaluated.

For more information, please contact
Dr. David B. Todd
(973) 596-5602
david@polymers-ppi.org

Dr. Kun Sup Hyun
(973) 596-3267
kshyun@polymers-ppi.org

Information Retrieval and Analysis

Responding to strong interest in expert documentation and analysis of new developments in polymer science and technology, PPI has introduced a current awareness service to its corporate members and clients: Information Retrieval and Analysis combines on-line retrieval of data and technical information from the patent and open literature through a variety of databases with expert analysis and evaluation of research results.

For more information, please contact
Dr. Subhash Patel
(973) 596-3566
subhash@polymers-ppi.org

PATENTS

"Helical Barrel Rheometer", D.B. Todd, C.G. Gogos, D. Charalampopoulous, US Patent 5,708,197, (1998).

"Back Mixed Drag Flow Apparatus", J.A. Biesenberger, D.B. Todd, US Patent 5,372,418, (1994).

"Method of Preparing Thermoplastic Foams using a Gaseous Blowing Agent", J.A. Biesenberger, S.K. Dey, and D.B. Todd, US Patent #5,707,573, (1998).

DESIGN AND COMPUTATION

Narh, K.A., Xanthos, M., Li, Z., Dey, S.K., Yilmazer, U., Li, Y., ?Simulation of the ?ntrusion?Process for Thick-Walled Thermoplastics- Product and Process ? ANTEC?8

U. Yilmazer, M. Xanthos, S.K. Dey, S. Mitra and C. Feng, ?echanical and Thermal Properties of Leachate Analysis of Carpet Residue/Polyethylene Prototypes for Building and Construction Applications? ANTEC?9, SPE Preprint page 3265.

"Simulation of the Intrusion Process for Thick-Walled Thermoplastics - Product and Process Characteristics", K.A. Narh, M. Xanthos, Z. Li, S.K. Dey, U. Yilmazer, Y. Li, SPE ANTEC, 1767, (1998).

"Prototype Design and Process Optimization Procedure for Products from Glass Fiber Reinforced Polymer Blends", K.A. Narh and M. Xanthos, Proc. ASME Intern Mech. Eng. Congr. Exp., MD - Vol 79, p. 151, Dallas, TX, November, 1997.

"Extrusion Process Analysis with PASS in Applications of CAE in Extrusion and other Continuous Processes", Sebastian, D.H. and R. Rakos, E.C. Bernhardt and K.E. O?rien, Eds., Hanser, New York (1992).

"New Insights into the Modeling of Co-rotating Intermeshing Twin Screw Extruders", Sebastian, D.H. and R. Rakos, ANTEC?0 Proceedings, p. 135, Dallas, Texas, 1990.

"Prediction and Verification of the Performance of Conveying Elements within the Co-rotating Fully Intermeshing Twin Screw Extruder", McCullough, T.W., D.H. Sebastian, and R. Rakos, ANTEC?0 Proceedings, p. 147, Dallas, Texas, 1990.


r Thickness in Flow of Concentrated Suspensions", F. Soltani and U. Yilmazer, J. Applied Polymer Science, Vol. 69, 515, (1998).

"Viscoelastic Properties of Suspensions with Weakly Interacting Particles", G. Bayram, U. Yilmazer, N. Orbey, J. Applied Polymer Science, Vol. 69, 507, (1998).

"Effect of Fillers on Thermal and Mechanical Properties of Polyurethanc Elastomer", S. Benli, U. Yilmazer, F. Pekel, S. Ozkar, J. Applied Polymer Science, Vol. 68, 1057, (1998).

"Mechanical and Burning Properties of Highly Loaded Composite Propellants", A. Goemez, C. Erisken, U. Yilmazer, F. Pekel, S. Ozkar, J. Applied Polymer Science, Vol. 67, 1547, (1998).

"Helical Barrel Rheometer", D.B. Todd, C.G. Gogos, D. Charalampopolous, US Patent 5,708,197, (1998).

"Processing/Structure Relationships of Mica-Filled Polyethylene Films with Low Oxygen Permeability" M. Xanthos, N. Faridi and Y. Li, Intern. Polym. Proc., 13, 1, 58, (March 1998).

" In-line Measurement of Gas Solubility in Polystyrene and Polyethylene Terephthalate Melts During Foam Extrusion", Q. Zhang, M. Xanthos and S.K. Dey, The 1998 International Mechanical Engineering Congress and Exposition, November 15-20, Anaheim, CA

"Effects of Matrix Composition on Properties of Glass Fiber Reinforced Polymer Blends" M. Xanthos, Proc. 55th SPE ANTEC, 43, 3109 (1997).

" Measurement of Melt Viscoelastic Properties of Polyethylene and Their Blends - A Comparison of Experimental Techniques" M. Xanthos, V. Tan and A. Ponnusamy, Polym. Eng. Sci., 37, 6, 1102 (1997)

"Effects of Carbonate Salts on Crystallization Kinetics and Properties of Recycled Polyethylene Terephthalate" M. Xanthos, B.C. Baltzis and P.P. Hsu, J. Appl. Polym. Sci., 64, 1423 (1997)

"Measurement of Gas Solubility in Thermoplastic Melts During Foam Extrusion" S.K. Dey, Q. Zhang, N. Faridi and M. Xanthos, Proc. 55th SPE ANTEC, 43, 1988 (1997).

"On-line and Off-line Gas Solubility Measurements in Foamable Thermoplastics", N. Faridi, S.K. Dey, M. Xanthos and Q. Zhang, Thirteenth International Polymer Processing Society Meeting, Meadowlands Hilton Hotel, Secaucus, NJ, June 10-13, 1997.

"Effects of Fillers on Permeability and Mechanical Properties of HDPE Blown Films" T.S. Gill and M. Xanthos, J. Vinyl and Addit. Technol., 2, 3, 248 (1996); ibid., Proc. 54th SPE ANTEC, 42, 1757 (1996).

"Some Microwave and Mechanical Properties of Carbon Fiber-Polypropylene and Carbon Black-Polypropylene Composites", A. Kaynak, A. Polat, U. Yilmazer, Materials Research Bulletin, 31, (1996).

"Modeling and Rheology of HTPB Solid Properties", C. Erisken, A. Goemez, U. Yilmazer, S. Ozkar, F. Pekel, "Energetic Materials - Technology, Manufacturing and Processing", 27th International Annual Conference of ICT, Karlsruhe, Germany, 49-1, (1996).

"Rheological Behavior of a Model Suspension: Hydroxyl Terminated Polybutadiene Filled with Glass Beads", G. Bayram, U. Yilmazer, N. Orbey, The 1996 I. Chem. Research Event/Second European Conference for Young Researchers, Leeds, England, 958, (1996).

"The Effect of Solids Loading on the Mechanical and Ballistic Properties of Solid Rocket Fuels", A. Goemez, C. Erisken, F. Pekel, U. Yilmazer, S. Ozkar, The Second Turkish Chemical Engineering Congress, 1397, (1996).

"The Helical Barrel Rheometer for On-line Viscometry", D.B. Todd, C.G. Gogos, M. Esseghir and D.W. Yu, 11th Int. Meeting of the Polymer Processing Society, Seoul, Korea, March, 1995.

"Polyolefin Blends with Low Oxygen Permeability" M. Xanthos, J. Grenci and S.S. Dagli, Proc. 53rd SPE ANTEC, 41, 3194 (1995).

"Emissions During Thermoplastics Processing-A Review" S.H. Patel and M. Xanthos, Adv. Polym. Technol,. 14, 1, 67 (1995).

"Recent Developments in In-line Spectroscopy/Microscopy for Monitoring Extrusion Processes" M. Xanthos and S.H. Patel, Adv. Polym. Technol, 14, 2, 151 (1995).

"Mechanisms and Performance of Hydrotalcite Acid Neutralizers in Thermoplastics" S.H. Patel, M. Xanthos, J. Grenci and P.B. Klepak, J. Vinyl and Addit.Technol., 1, 3, 201(1995); ibid., Proc. 53rd SPE ANTEC, 41, 3644 (1995).

"Comparative Analysis of Commercially Available Temperature and Pressure Sensors for Polymer Processing", T. Gill, S.K. Dey and M. Xanthos, Fifth Annual Mini-Tech Conference, NJIT, Newark, NJ, April 21, 1995.

"Recent Developments in On-line Analytical Techniques Applicable to the Polymer Industry", S.H. Patel, D.B. Todd, M. Xanthos, SPE ANTEC, 40, 2214, (1994).

"How Rheology Impacts Manufacturing", C.G. Gogos, S. Bhakuni, R. Potluri and M. Zafar, Food Ingredients Europe, Earls Court, London, October, 1994.

"Flow Instabilities in Capillary Flow of Concentrated Suspensions", P. Yaras, D.M. Kalyon, U. Yilmazer, Rheol. Actu., 88, (1994).

"Desorption of Residual Monomer from PVC Resins in a Fluidized Drier", H. Bouaffar, U. Yilmazer, B. Elbirli, J. Applied Polymer Science, 119, (1994).

"Rheological Properties of Filled Polymers", G. Bayram, N. Orbey, U. Yilmazer, The First Turkish Chemical Engineering Congress, Vol. 1, 576, (1994).

"Applications of On-Line Rheology in Reactive Alloying", M. Xanthos, J. Grenci, C. Jacob, S.S. Dagli and H.K. Kotlar, Proc. SPE RETEC on "Blends, Alloys and Modified Polymers", Akron, OH, October 5-6, 1993.

"Flow Response and Microstructure of Polymers Reinforced with Discontinuous Fibers", T. Davidson, T.A. Huang, J.P. Brizzolara and D.H. Sebastian, Mat. Res. Soc. Symp. Proc., 289, 231-235, 1993.

"The Role of Interface at the Wall in Flow of Concentrated Composites", U. Yilmazer and D. M.Kalyon, The Interfacial Interactions in Polymeric Composites, G. Akovali E., Kluwer Pulblishers, 109, (1993).

"Extrusion and Lubrication Flows of Viscoplastic Fluids with Wall Slip", A. Lawal, D. M. Kalyon, U. Yilmazer, Chem. Eng. Com., 127, (1993).

"Rheological Behavior of a Concentrated Suspension. A Solid Rocket Fuel Simulant", D.M. Kalyon, P. Yaras, B. Aral, U. Yilmazer, J. Rheol., 32, (1993).

"Development of Potentially Degradable Materials for Marine Applications - III. Polyethylene-Polyethylene Oxide Blends", K.E. Gonsalves, S.H. Patel and D.H. Trivedi, J. Appl. Polym. Sci., 45, 217-225 (1992).

"Mechanical Properties and Weatherin Behavior of Linear Low Density Polyethylene/Low Density Polyethylene Blends for Agricultural Applications", U. Yilmazer, Advances in Polymer Blends and Alloy Technology, Vol. III, Technomic, 132, (1992).

"Tensile, Flexural and Impact Properties of Thermoplastic Matirx Reinforced by Glass Fiber and Glass Bead Hybrids", U. Yilmazer, Composite Science and Technology, 119, (1992).

"Measuring Thermal Conductivity and Thermal Diffusivity of Polymeric Solids and Melts", V. Tan, Advances in Polymer Technology, Vol. 11, 1, p. 69-71, 1991/1992.

"Measuring Polymer Melt Viscosities at High Pressures: The Hydrostatic Pressure Rheometer", R. Staats-Westover, Advances in Polymer Technology, Vol. 11, 2, p. 147-151, 1991/1992.

"Development of Potentially Degradable Materials for Marine Applications - II. Polypropylene-Starch Blends", K.E. Gonsalves, S.H. Patel and X. Chen., J. Appl. Polym. Sci., 43, 405-415 (1991).

"Melting Behavior of Controlled Rheology Polypropylene" S.H. Ryu, C.G. Gogos and M. Xanthos, Polymer, 32, 13, 2449 (1991).

"Dilatancy of Concentrated Suspensions with Newtonian Matrices", U. Yilmazer, D.M. Kalyon, Polymer Composites, 26, (1991).

"Development of a PVC Water Proofing Sheet", U. Yilmazer, Polymer-Plastic Technology and Engineering, 239, (1991).

"Rheocalorimeter - Measures Reaction Viscosity vs. Conversion from Monomer to Polymer", J.A. Biesenberger and D. Rosendale, Advances in Polymer Technology, Vol. 10, 2, p. 153-155, 1990.

"Rheological Behavior of Highly Filled Suspensions Which Exhibit S