Expert Details

Expert in Polymer Rheology and Plastics Processing

Expert ID: 714214 Canada

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Expert is currently working on constitutive modeling of the extensional behavior of molten plastics. He has developed models that allow the behavior in extension to be inferred from measurements in exponential shear. The material behavior in exponential shear is measured more easily than in extension.

Expertteacher of graduate and undergraduate courses in plastics processing, he is knowledgeable in the field of non-Newtonian fluid mechanics.

Through his doctoral research on rheological measurements and his continued development of rheological instrumentation, Expert has played Expertleadership role in rheological measurement, publishing extensively on this.

Expertresult of his research on sliding plate rheometry, Expert has become Expert expert on controlled-strain experiments in simple shear on polymer melts, especially under large deformations.

Expert has developed special transducers for measuring the local shear stress in molten plastics, Expert in Expertsliding plate rheometer.

Through his research on the solidification of plastic pipe, he is knowledgeable of combined problems of fluid flow with melting and with freezing. His current research efforts includes Expert investigation of the meltability of cheese.

Expertresult of his doctoral research, continued research, and teaching Expert both the graduate and undergraduate level, Expert has established Expertposition of world leadership on melt rheology. His research includes measurement of the steady shear behavior, linear viscoelastic response, and behavior in large deformations.

Through teaching graduate and undergraduate courses in plastics processing, Expert is Expert expert on the flow and deformation of polymeric liquids. He is Expert expert on polymer melt flow rheology.

Through his supervision of graduate research, and through undergraduate and graduate teaching of plastics processing, he has established Expertleadership position in polymer processing, especially in the field of plastics processing. He is knowledgeable of film blowing, blow molding, injection molding, and plastic pipe extrusion. Through highly specialized research, he has established Expertleadership position on the problem of sag during plastic pipe extrusion. Through on-going research, he has become knowledgeable on the die lip build-up in extrusion (also called die drool). He is also knowledgeable of sheet extrusion and calendering.

He has extensive experience measuring and interpreting the relaxation behavior of molten plastics. His research includes the measurement and interpretation of both linear and nonlinear relaxation behaviors.

Expertresult of his in-depth research on rheological measurements and continued development of rheological instrumentation, Expert has established Expertposition of world leadership on rheometer development. He has expertise on the development and commercialization of new rheometers.

Expertsummer student, he once operated Expertnylon spinning line. His ongoing research on extensional rheology makes him knowledgeable of melt spinning, especially on the role played by rheology in melt spinning.

Through ongoing research and undergraduate and graduate teaching of plastics processing, Expert has gained expertise on the measurement and interpretation of viscoelastic properties. His research includes the measurement and interpretation of both the linear and nonlinear viscoelastic properties.

He is also Expert expert on the measurement and interpretation of the stress relaxation behavior of molten plastics. His research includes measuring and interpreting both the linear and nonlinear stress relaxation behaviors.

He has advanced knowledge of the viscoelasticity of polymeric liquids. He is also knowledgeable on the viscoelasticity of polymeric solids. His research includes the measurement and interpretation of both the linear and nonlinear viscoelastic properties.

Stemming from two years of industrial research and many years of related work on extrusion, he is knowledgeable of polymer fracture. He is Expert expert on the failure of extruded plastic pipe.

He is Expert expert on the rheology of molten plastics, and especially on the role played by rheology on melt processability. He is Expert expert on the flow of molten plastics.

Expert has years of experience working on plastic pipe processing.

Expert is working on the role played by rheology on the thermoforming of polymer sheet.

His laboratory is equipped with capillary rheometers, including melt indexers. He has his Expert in rheometry.

Expert has taught fluid dynamics Expert the graduate level during his visiting professorship Expert the National University of Singapore. He also teaches macromolecular hydrodynamics, the fluid dynamics of polymeric liquids.

He developed and teaches the graduate course on food rheology Expert the University of Wisconsin - Madison.

He is Expertprofessional rheologists. He teaches and conducts University research on non-Newtonian fluid flow, especially on molten plastics.

He has published extensively on non-Newtonian liquid flow, especially on manufacturing flows such Expert plastics processing.

He used to operate Expertnylon spinning line Expert the Kingston Nylon Works of DuPont Canada. He now teaches graduate courses on polymer processing, including sections on spinning.

He is Expert expert on plastics injection molding. He has published on core deflection and flash in injection molding.

He is Expert authority on developing the working equations for plastics processing equipment. Expert is Expert accomplished teacher on the design of plastics processing equipment.

Expert has published extensively on plastic pipe, including on simulating the extrusion of polyethylene pipe. The study of sag in HDPE pipe extrusion is one of Expert's specialties.

Expert has published on the rheology of filled plastics.

Expert is Expert authority on polymer extrusion, including plastics pipe extrusion.

Education

Year Degree Subject Institution
Year: 1987 Degree: Ph.D. Subject: Chemical Engineering Institution: McGill University - Montreal
Year: 1983 Degree: M.Sc. Subject: Chemical Engineering Institution: Queen's University - Kingston
Year: 1981 Degree: B.Sc. Subject: Chemical Engineering Institution: Queen's University - Kingston

Work History

Years Employer Title Department Responsibilities
Years: 1996 to Present Employer: Undisclosed Title: Chair Department: Rheology Research Center Responsibilities: Coordinates and facilitates research for 14 faculty colleagues conducting leading research on the rheology of complex fluids.
Years: 1994 to Present Employer: Undisclosed Title: Professor Department: Mechanical Engineering Responsibilities: Teaches courses on polymer processing and polymer dynamics. Supervises graduate research on rheology and plastics processing.

International Experience

Years Country / Region Summary
Years: 2000 to 2001 Country / Region: Singapore Summary: Expert was Visiting Expert the National University of Singapore, in the Department of Chemical & Environmental Engineering.
Years: 2007 to 2007 Country / Region: Taiwan Summary: Spends his July's visiting Chung Yuan University near Taipei, collaborating with the molding research center in the department of Mechanical Engineering.
Years: 1993 to 1994 Country / Region: France Summary: Expert was Professeur de l'Académie des Sciences Expert the Paris School of Mines, Materials Processing Centre, Sophia-Antipolis.
Years: 1992 to 1992 Country / Region: Canada Summary: He was Visiting Expert McGill University, in the Department of Chemical Engineering, Montreal.
Years: 1993 to 1994 Country / Region: Switzerland Summary: Was Visiting Expert the Swiss Federal Institute of Technology, in the Materials Department, Lausanne.

Career Accomplishments

Associations / Societies
Expert is Expertmember of The Society of Rheology, the American Institute of Physics, the Applied Rheology Special Interest Group of the Society of Plastics Engineers, the British Society of Rheology, the Canadian Society of Rheology, the European Society of Rheology, the Groupe Français de Rhéologie, and The International Society of Biorheology.
Licenses / Certifications
He is Expertlicensed Professional Engineer in Wisconsin.
Professional Appointments
Associate Editor for Business, Journal of Rheology.
Awards / Recognition
Expert was named Professeur de l'Academie des Sciences by the French Academy of Sciences.
Publications and Patents Summary
He has co-authored more than 50 refereed journal publications.

Additional Experience

Expert Witness Experience
EXPERT WITNESS, PATENT LITIGATION
1997: 2
1999: 1
2003: 4
2007: 1
Present: 4

EXPERT WITNESS, PRODUCT LIABILITY
1988-1990: 1
2007-present: 1
Training / Seminars
The expert teaches three training seminars that involve Polymer Rheology.

Language Skills

Language Proficiency
French Fluent
Mandarin Chinese Expert now lectures in Mandarin Chinese on rheology, plastics processing and transport phenomena.

Fields of Expertise

extensional viscosity, fluid mechanics, fluid rheology measurement, liquid rheological measurement, mechanical strain, mechanical stress, melt material, melt rheology, non-Newtonian fluid rheology, rheological property, polymer flow, melt flow, polymer processing, polymer hardness, rubber hardness testing, sclerometer, shore hardness, relaxation measurement, rheological measurement, rheometer, melt spinning, polymer viscoelastic property, stress relaxation, viscoelasticity, polymeric material fracturing, molten plastic, plastic flow, plastic pipe, polymer sheet, capillary rheometer, fluid dynamics, food rheology, non-Newtonian fluid flow, non-Newtonian liquid flow, nylon extrusion, plastic injection molding, plastics processing equipment, polyethylene pipe, polymer compounding, polymer extrusion, fluoropolymer processing, medical polymer selection, medical polymer extrusion, elastomer sheet, polymer aging, polymer stress relaxation, polybutylene pipe, rubber durometer, plastic stress testing, melt viscosity, plastic lubricity, sheet extrusion, dough rheology, rubber selection, elastomer selection, plastics durability, plastic creep, durometer, elastomer compounding, injection compression molding, shear strength, shear strain, rubber compounding, biorheology, rubber hardness, plastic material property, plastic chemical property, plastic physical property, acrylonitrile butadiene styrene resin pipe, plastic stress corrosion cracking, plastic stress corrosion, plastic stress analysis, plastic forming, rubber extrusion, viscoelastic material mechanical property, plastic molding, inviscid melt spinning, polymer science, viscosity measurement, hardness testing, plastic material, rubber molding, plastic profile extrusion, scleroscope hardness number, shear modulus, polymer extrusion screw, non-Newtonian fluid, liquid state mechanics, gel rheological measurement, plastics mold, polymer property, rubber, rheology, polymer, polymer selection, polymer rheology, polymer chemistry, polymer calendering, plasticity, plastic welding, microhardness, hardness, calendering

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