ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
We have used the pulsed-gradient spin-echo technique to measure self-diffusion in low-molecular-weight polymers in the melt and dissolved in identical polymers of high molecular weight. Specimens used were cis-polyisoprenes and polydimethylsiloxane. We find that, except for substantial free-volume corrections, self-diffusion in unentangled polyisoprene melts scales inversely with molecular weight. The results include sensitive determinations of chain-end free volume.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1982.180200612
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