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Molecular weights of natural rubbers from selected temperate zone plants
Author(s) -
Swanson C. L.,
Buchanan R. A.,
Otey F. H.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230309
Subject(s) - natural rubber , hevea , gel permeation chromatography , dispersity , molecular mass , temperate climate , hevea brasiliensis , chemistry , botany , biology , polymer chemistry , organic chemistry , polymer , enzyme
Molecular weights and molecular weight distributions are compared by gel permeation chromatography for rubbers from 33 north temperate zone plants, guayule, and Hevea. Rubbers isolated from all the northern plants had much lower weight‐average molecular weight ( M w ) values (9.72 × 10 4 –4.95 × 10 5 ) than milled Hevea (1.31 × 10 6 ) or guayule (1.28 × 10 6 ) rubber. Pycnanthemum incanum , Lamiastrum galeobdolon , Monarda fistulosa , and Vernonia fasciculata produced potentially useful natural rubbers having M w values above 4 × 10 5 and polydispersity factors of 3.1–4.5.