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Cure synergism in XNBR vulcanization in presence of thiophosphoryl disulfides and amine disulfide/thiazole accelerators
Author(s) -
Biswas Tapasi,
Basu Dipak Kumar
Publication year - 1996
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/(sici)1097-4628(19960531)60:9<1349::aid-app10>3.0.co;2-y
Subject(s) - vulcanization , thiazole , disulfide bond , amine gas treating , chemistry , polymer chemistry , materials science , organic chemistry , natural rubber , biochemistry
The study deals with the vulcanization of carboxylated nitrile butadiene rubber (XNBR) having synergistic combinations of accelerators comprising thiophosphoryl disulfide as one of the components. Other constituent accelerators employed in the present investigation are 2‐mercaptobenzothiazole (MBT), 2‐mercaptobenzothiazyl disulfide (MBTS), bis( N ‐oxydiethylene)disulfide (ODDS), N ‐oxydiethylene 2‐benzothiazole sulfenamide (OBTS), etc. The binary combinations of thiophosphoryl disulfides with OBTS exhibited the highest mutual activity in the respective areas, so far as the physical properties are concerned. Structural characterization of different thiophosphoryl disulfide‐accelerated XNBR vulcanizates, including those formed from the synergistic combinations with OBTS, were studied using a methyl iodide probe. It was found that the amount of sulfidic crosslinks arising from the reaction between COOH groups of XNBR and thiophosphoryl disulfides, actually controls the network structure as wellas the physical properties of the vulcanizates. © 1996 John Wiley & Sons, Inc.