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Differential scanning calorimetric study of the interaction of 2,2′‐dibenzothiazole, sulfur, zinc oxide, and stearic acid in the presence of polyisoprene
Author(s) -
Luyt Adriaan S.
Publication year - 1992
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.1992.070440819
Subject(s) - stearic acid , vulcanization , sulfur , zinc , differential scanning calorimetry , materials science , polymer chemistry , chemical engineering , chemistry , composite material , natural rubber , metallurgy , thermodynamics , physics , engineering
The interactions between mixtures of 2,2'‐dibenzothiazole (MBTS), sulfur, ZnO, and stearic acid were studied by DSC in the presence of polyisoprene (IR). In the absence of ZnO, the onset of vulcanization was at a lower temperature than in its presnece, and the crosslink densities were relatively low. ZnO as well as stearic acid did not influence the consumption of MBTS, but the amount of MBT in the sample after vulcanization increased in the presence of ZnO and still more when ZnO and stearic acid were present—the same applied for the crosslink densities. In view of these results, interaction mechanisms are proposed for the different systems.