Component Dynamics in Miscible Blends: Equally and Unequally Entangled Polyisoprene/Polyvinylethylene
Abstract
Miscible blends of 1,4-polyisoprene (PIP) and polyvinylethylene (PVE) are studied using rheo-optical methods to extract the dynamics of each component in the blend. Since orientational coupling contributes to the birefringence, but not the stress, simultaneous analysis of these observables for bidisperse blends is used to determine the coupling coefficient, ε. No systematic dependence of ε on composition or temperature was detected. The dynamics of the blend components extracted using the mean value of ε are in good agreement with those observed previously for equally entangled blends: blending causes only small changes in the component entanglement molecular weights but dramatically alters the species' friction coefficients, with the dynamics of the high T_g species (PVE ) being more sensitive to both temperature and composition.
Additional Information
© 1997 American Chemical Society. Received June 21, 1996; Revised Manuscript Received December 3, 1996. We gratefully acknowledge the support of the National Science Foundation Presidential Young Investigator Award (J.A.K.), the National Physical Science Consortium (B.H.A.), the Petroleum Research Fund administered by the American Chemical Society, Chevron, and the Caltech Consortium in Chemistry and Chemical Engineering: E. I. du Pont de Nemours and Company, Inc. and Eastman Kodak Company.Additional details
- Eprint ID
- 88033
- Resolver ID
- CaltechAUTHORS:20180719-154658858
- NSF
- National Physical Science Consortium
- American Chemical Society Petroleum Research Fund
- Chevron Corporation
- Caltech Consortium in Chemistry and Chemical Engineering
- E. I. DuPont de Nemours and Company, Inc.
- Eastman Kodak Company
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2018-07-19Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field