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Relations between Wallace plasticity and Mw for natural rubber

✍ Scribed by F. Bonfils; A. Flori; J. Sainte Beuve

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 240 KB
Volume: 74
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19991220)74:13<3078::aid-app10>3.0.co;2-6

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✦ Synopsis

Wallace plasticity and the weight-average molar mass (M w ) were measured on natural rubber samples of different origins. A sigmoidal model describes the relations between Wallace plasticity and M w (0.872 Ͼ r 2 Ͼ 0.992) for given families of samples. The families of samples analyzed differed through their clonal origin, collection method (cup lumps or latex), and type of processing (CV or non-CV). This study showed that two samples of natural rubber can be identical in terms of plasticity, but very different in terms of the average polyisoprene chain length or M w .

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