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Vulcanization of polybutadiene rubber with dipentamethylene thiuram tetrasulfide
Author(s) -
Posadas P.,
Fernández A.,
Brasero J.,
Valentín J. L.,
Marcos A.,
Rodríguez A.,
González L.
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.27026
Subject(s) - polybutadiene , vulcanization , polymer chemistry , natural rubber , curing (chemistry) , allylic rearrangement , materials science , polymer science , chemistry , polymerization , copolymer , organic chemistry , polymer , catalysis
The cure of polybutadiene rubber (BR) with sulfur donor dipentamethylene thiuram tetrasulfide (DPTT) does not show reversion reaction, in contrast with similar natural rubber compounds. No polysulfure links are formed; whereas a great amount of CC crosslinks are produced. The addition of tetramethyl thiuram monosulfidic (TMTM) strongly affects the crosslinking process. Mechanical properties of the cured compounds are poor. In DPTT, curing of BR the radical species produced through homolitic cleavage of DPTT molecule seems to have sufficient energy to produce crosslinking, via allylic abstraction, and also initiate the polymerization of double bonds producing areas of high crosslinking density that induce early material failure. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 106: 3481–3487, 2007