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Thermal behavior of natural rubber and chlorinated rubber blends
Author(s) -
Cook J. W.,
Edge S.,
Packham D. E.,
Thompson A. S.
Publication year - 1997
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(19970815)65:7<1379::aid-app16>3.0.co;2-q
Subject(s) - natural rubber , differential scanning calorimetry , materials science , isoprene , polymer chemistry , composite material , polymer , chemical engineering , copolymer , thermodynamics , physics , engineering
Abstract A solid‐state chemical reaction occurs when a solvent cast film of a blend of masticated natural rubber and chlorinated natural rubber is heated in the presence of air at 150°C. The thermal behavior of solvent cast films of chlorinated natural rubber, masticated natural rubber, and a 1 : 1 w/w blend (2% w/v in xylene) of these two polymers has been studied using differential scanning calorimetry, infrared spectroscopy, scanning electron microscopy, and nuclear magnetic spectroscopy. The results suggest that carbonyl groups are incorporated into the blend on heating and that the vinyl functionality of the isoprene units is modified during this apparent oxidation. Heating for 2 h at 150°C results in a material that no longer contains the rubber‐like cis ‐1,4‐polyisoprene units. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 1379–1384, 1997