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A Two-Day Short Course On

Extensional Rheology of Polymer Melts and Solutions

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bullet_blue.GIF (262 bytes)  Date and Location
bullet_blue.GIF (262 bytes)  Instructors
bullet_blue.GIF (262 bytes)  Course Description
bullet_blue.GIF (262 bytes)  Registration Information
bullet_blue.GIF (262 bytes)  Registration Forms

Date and Location

Saturday and Sunday
October 3 & 4, 1998

in conjunction with the
70th Annual Meeting of The Society of Rheology
October 4-8, 1998

Stanford Terrace Inn
531 Stanford Avenue
Palo Alto, CA 94306
Phone: 650-857-0333
Fax: 650-857-0343
PLEASE NOTE: the short course will be held on the Stanford University Campus, the Rheology meeting is in Monterey, California. Transportation from Stanford to Monterey will be provided.

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Donald G. Baird
Virginia Polytechnic Institute
& State University

Gareth H. McKinley
Massachusetts Institute of Technology

David F. James
University of Toronto

Donald G. Baird is the Harry C. Wyatt Professor of Chemical Engineering at Virginia Tech whose primary interest is in the application of rheology to the processing of polymer melts.He is the co-author of a recent book entitled "Polymer Processing: Principles and Design".

Gareth H. McKinley is the Lord Associate Professor of Mechanical Engineering at the Massachusetts Institute of Technology. His primary research interests focus on the extensional rheology of polymer solutions and the stability of viscoelastic flows.

David F. James is Professor of Mechanical Engineering at the University of Toronto and is internationally recognized for his work in the extensional flow of polymer solutions.

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Course Description

The processing of polymer melts and solutions involves both shear and extensional (i.e. shearfree) deformations. While transport processes are generally dominated by shear, it is the extensional component which often governs the processing performance of a fluid. A fluid’s extensional behavior is most likely related to many processing and flow problems such as melt fracture which originates in the die entry, draw resonance in fiber spinning and film casting, fluctuations in the frost-line and bubble diameter in film blowing, and variations in film thickness in coating processes, tack problems in printing, and droplet size distribution in spraying. However, in most laboratories the material functions most commonly measured are the shear properties and in industrial laboratories or quality-control applications the primary emphasis is on the shear viscosity and linear viscoelastic properties of a material. Yet, there are a number of documented instances in which two fluids have similar viscous behavior and apparent molecular weights, but do not process in the same way. Large differences in the material characteristics are only manifested in the tensile stress growth observed during elongational flow.

In this course, we begin by describing the differences between extensional and shear kinematics. We then turn our attention to the wide variety of experimental techniques for measuring the extensional properties of polymer solutions and then polymer melts. Both rigorous and approximate techniques are discussed. Throughout the course examples of applications of the measurements are provided. A portion of the course will be devoted to a discussion of constitutive equations appropriate for handling the various classes of extensional rheological response observed for melts and solutions and their importance in computational modeling of polymer processing operations.

The course is designed to be suitable for a wide range of professionals including engineers, chemists, and physicists, as well as students in these disciplines. Although the emphasis will be on experimental techniques and applications of the measurements, discussion of constitutive equations which are suitable for both shear and extension will be included.

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Registration Information

The fee for the two-day course is $375 prior to September 15, 1998. For registration after September 15, the fee will be $425. Student rates are half of the above.

Checks should be made payable to The Society of Rheology and sent together with the short course registration form to:

Professor Susan J. Muller
Department of Chemical Engineering
University of California, Berkeley
Berkeley, CA 94720-1462

Reservations for lodging should be made by the participant. A block of rooms is being held for the short course at the Stanford Terrace Inn (telephone: 650-857-0333; hotel registration form is available at this website) in Palo Alto, walking distance to the classroom. Transportation from Stanford to the SOR meeting in Monterey will be provided for participants.

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Registration Forms

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Updated 14 February 2010