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David W. Riley
Extrusion Engineers
drdavidwriley@msn.com
Phone or fax: 908-369- 7260
858 Princeton Court
Branchburg, New Jersey
08853-9686 |
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Twenty eight years as a consultant in the field of Plastic Processing.
Forty years experience in developing
Polymer Defect Technology
Twenty five years in developing the field of
Plastic and Polymer coefficient of friction
Related to the feed section of the extruder
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 PREVIOUS
EXPERIENCE
- Research and development and plant technology on all thermoplastic materials for:
- Tenneco (PVC) 1978-1981
- Scientific Process & Research (Friction Research Director) 1976- 1978
- General Cable Research and Production (Technology Manager--PE) 1967-1976
- Western Electric-Buffalo (Sr. Development Engineer--PVC and PE) 1960-1967
- Union Carbide Silicones (Research Engineer) 1954-1960
- E. I. DuPont de Nemours Polychemicals Dept. (Research Chemist--PE) 1951-1954
- US Naval Officer, Deck, Watch and Small Boat Officer—1944-46
- Goodyear Research (Research Chemist) Synthetic Rubber 1943-4, 6
EDUCATION
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PhD and MSc Physical Organic Chemistry
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The Ohio State University (1946-1951)
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BS in Chemistry, Tufts University 1943
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Modern Physics and Creativity, 1963
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Western Electric Graduate Engineering Training Center
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Sun Times Building, Chicago, IL
AREAS OF EXPERTISE
- Expert Witness
- Analytical Instrumentation Adaptation to Processing Equipment
- Friction Analysis
- Melt Rheology
- Extrusion Equipment: Design & Analysis of Production
- Telecommunication Cables and Insulation
- Power Cables and Testing XLDPE
- All phases of PVC Compounding & Extrusion
- Thermal Stability of Polymers
- Surface Chemistry, Metals & Polymers
- Polyethylene Analysis, FTIR & Electrical
PUBLICATIONS (partial list)
- Extrusion and Methods of Analysis, 1977
- Friction Properties of Thermoplastic Solids, 1977, 1978, 1979
- Rheology of PVC Blends for SPE ANTEC, 1980
- Elongation Flow Behavior of PVC Melt, 1981
- New Flow Measurements in Wire Extrusion, 1983
- Lubrication of Rigid PVC, 1983
- On-Line Technique for Polymer Quality Analysis, 1985
- Moral and Ethical Issues in Consulting, 1990
- Quantification and Prediction of Processing Damage in Extruded PVC, 1990
- Molecular Structural Changes Sensed by PVC Melt Flow, 1991
- Melt Rheology, Chapter, Encyclopedia of PVC, 1992
- Thermal/Mechanical Properties of Vinyl Compounds, Vinyl 201:
- A Comprehensive Processing Update Technical Conference,
Atlanta, GA, September 22,1993
- Typical Effects of Additives on the Rheological Properties of Polymers,
PMAD/SPE Technical Conference on Modifiers & Additives, 1996
- Troubleshooting the Extrusion Process, PMAD/SPE, 1997
- Analysis of Polymers by On-Line Rheological Instruments, ANTEC, 1997
- The Power of Infrared Spectroscopy in Detecting Molecular Structural
Changes in High Density Polyethylene Due to Processing, The Chemist, 1998
- Effects of Additives on Polyolefin Rheology , Polyolefins Conference, Feb. 1998
- An Optical Determination of Melt Viscosity Through Particle Kinematics, ANTEC
1999
- The Effect of Lubricants on Processing Detection by PVC Melt Flow, JVAT, 1999
- Effects of Additives on Polyolefin Rheology, Plastics Engineering, June 1999
- New Techniques for Analyzing Rigid Foamable PVC Compounds, Foams 99
- Structural Defects Detected, U. Delaware, Nov. 2,1999
- Rheology Beyond One Million Reciprocal Seconds, May 7, 2001
- Shear Effects on the Molecular Structure of Polymers, PPS, June 2004
- Problems with Extrusion, Wire Assoc. June 2004
SIGNIFICANT ACHIEVEMENTS
- Invented Analytical Engineering, a term devoted to a scientific analysis of production primarily in the field of extrusion
- Invented an extrusion rate controller which cut the product temperature variability by an order of magnitude on a 150 mm extruder, significantly improving the quality control in a $40 million wire and cable facility.
- Designed an extruder screw which saved the wire and cable company $360,000/year in production costs.
- Invented "Flow Vision", an instrument on-line for inspecting polymer melts for gels, voids, contamination and any other heterogeneity.
- Invented a rheological tool for measuring the degree of shear damage done to polymers during processing. This includes the level of fragmentation and the incipient crosslinking in processing as function of shear rate.
- Developed ASTM Methods for analyzing plastics, D 3364 Melt Flow Analyzer, D 3591 Analysis of Formulated PVC, D 5576 Structural Entities in Polyolefins by IR, D 5477 Polymer Layers or Inclusions by FTIR
PROFESSIONAL SOCIETIES
- Fellow, Past President & Past Board Chairman, American Institute of Chemists
- Fellow, American Association for the Advancement of Science
- Fellow, American Society for Testing and Materials (ASTM International)
- Emeritus Fellow, Society of Plastics Engineers (SPE)
- Certified Professional Chemist & Chemical Engineer
- By National Certification Commission
- Life Senior Member, Institute of Electrical and Electronic Engineers
- Emeritus Member, American Chemical Society
- Member, Society of Applied Spectroscopy
- Member, Society of Rheology
- Distinguished Member, Past President and Past Councilor of the
- Palisades Section of SPE
- Initiator & Past Councilor and Past Chairman and again Councilor of the
- Polymer Modifiers and Additives Division of SPE
- Past Councilor for the Polymer Analysis Division of SPE
- Section Chairman on Molecular Parameters &
- Spectroscopy for ASTM Committee D 20 on Plastics
- Past Chairman, Subcommittee D 20.70 on
- Analytical Methods, Member for Forty Five Years
- ASTM Comm. G02 on Wear and Erosion Terminology
- American Institute of Chemical Engneers
- American Society for Mechanical Engineers
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