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Inhibited oxidation of vulcanized natural rubber
Author(s) -
Bevilacqua E. M.
Publication year - 1966
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.1966.070101116
Subject(s) - vulcanization , sulfenamide , natural rubber , sulfur , dithiocarbamate , curing (chemistry) , oxygen , polymer chemistry , materials science , chemistry , chemical engineering , composite material , organic chemistry , engineering
Rates of oxidation in oxygen at 140°C. of natural rubber gum vulcanizates containing PBNA as inhibitor have been compared. They are a function of sulfur combined with the rubber, and only slightly affected by curing system for sulfur alone, TMTD sulfurless, and very high‐efficiency sulfenamide plus dithiocarbamate‐accelerated compositions. Addition of diphenylguanidine to simple sulfur vulcanizates causes much faster oxidation. No conclusions about oxidation mechanism can be drawn from rates of oxidation alone.