Ylitalo, Caroline M. and Kornfield, Julia A. and Fuller, Gerald G. and Pearson, Dale S. (1991) Molecular weight dependence of component dynamics in bidisperse melt rheology. Macromolecules, 24 (3). pp. 749-758. ISSN 0024-9297. doi:10.1021/ma00003a019. https://resolver.caltech.edu/CaltechAUTHORS:20180720-134054459
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20180720-134054459
Abstract
Simultaneous measurement of infrared dichroism and birefringence is used to study component relaxation in bimodal molecular weight distribution melts. Nearly monodisperse poly(ethylenepropylene) samples of molecular weights 53K, 125K, and 370K, all above the critical molecular weight for entanglement, were used. Results for the step-strain relaxation of each component and of the total sample are presented and discussed for binary blends of 10, 20, 30, 50, and 75% by volume of the higher molecular weight species for three seta of blends: 53K/125K, 53K/370K, and 125K/370K. For each sample, the relaxation dynamics of the blend and of each component depend upon the two polymer relaxation times and the blend composition. Effects of intermolecular orientational coupling interactions were observed, and a coupling strength of 0.45 was measured. The results of these experiments are compared to a reptation-based constraint release model, and a qualitative agreement is found.
| Item Type: | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| ||||||||
| ORCID: |
| ||||||||
| Additional Information: | © 1991 American Chemical Society. Received April 19, 1990; Revised Manuscript Received July 30, 1990. We are grateful to the National Science Foundation for support through the Presidential Young Investigator program for G. Fuller. This work was also supported by the Exxon Foundation and the Center for Materials Research at Stanford University. We thank Lewis Fetters for synthesizing the polymers used in this study. | ||||||||
| Funders: |
| ||||||||
| Issue or Number: | 3 | ||||||||
| DOI: | 10.1021/ma00003a019 | ||||||||
| Record Number: | CaltechAUTHORS:20180720-134054459 | ||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180720-134054459 | ||||||||
| Official Citation: | Molecular weight dependence of component dynamics in bidisperse melt rheology Caroline M. Ylitalo, Julia A. Kornfield, Gerald G. Fuller, and Dale S. Pearson Macromolecules 1991 24 (3), 749-758 DOI: 10.1021/ma00003a019 | ||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||
| ID Code: | 88074 | ||||||||
| Collection: | CaltechAUTHORS | ||||||||
| Deposited By: | George Porter | ||||||||
| Deposited On: | 23 Jul 2018 21:49 | ||||||||
| Last Modified: | 16 Nov 2021 00:23 |
Repository Staff Only: item control page
