Premium
Production of low‐molecular‐weight natural rubber: Comparative assessment of a nonchemical route
Author(s) -
Okwu U. N.,
Akinlabi A. K.
Publication year - 2007
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.26560
Subject(s) - natural rubber , nitrobenzene , materials science , polymer , polymer chemistry , chemistry , composite material , organic chemistry , catalysis
Abstract The use of Funtumia latex and nitrobenzene as molecular weight depressants for natural rubber was studied. Portions of a given sample of natural rubber latex were treated with these materials, and this provided a means of ascertaining the amount of Funtumia latex in a blend with natural rubber that could produce a lowering of the molecular weight equivalent to that from known concentrations of nitrobenzene in natural rubber latex. The molecular weight of the products decreased to an equilibrium value after 10 h of reaction with nitrobenzene. The calculations revealed that a 27.9% substitution of natural rubber latex (300 mL) with Funtumia rubber latex achieved the same result as nitrobenzene in the same polymer at concentrations of 0.5–2.0 wt % of the dry rubber content of the latex after 10 h of reaction. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007