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Crosslinking efficiencies of dicumyl peroxide in unsaturated synthetic rubbers
Author(s) -
Loan L. D.
Publication year - 1963
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.1963.070070624
Subject(s) - chloroprene , polybutadiene , acrylonitrile , natural rubber , neoprene , peroxide , organic peroxide , hydrogen peroxide , polymer chemistry , radical , materials science , nitrile rubber , elastomer , molecule , chemistry , polymer , copolymer , organic chemistry , composite material
The crosslinking efficiencies of dicumyl peroxide in SBR, cis ‐polybutadiene, acrylonitrile–butadiene rubber, and polychloroprene have been measured. For the first two rubbers approximately ten crosslinks are formed per molecule of peroxide decomposed, while for the acrylonitrile–butadiene rubber an efficiency close to unity is found. With polychloroprene approximately two molecules of peroxide are used for each crosslink formed. Analysis of the low molecular weight products of the reaction shows that ease of hydrogen abstraction by cumyloxy radicals decreases in the order given above.