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Studies on chemical interactions between chlorosulphonated polyethylene and carboxylated nitrile rubber
Author(s) -
Roychoudhury A.,
De P. P.
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(19970328)63:13<1761::aid-app8>3.0.co;2-e
Subject(s) - nitrile rubber , natural rubber , nitrile , polymer chemistry , polyethylene , materials science , polymer , reactivity (psychology) , chemical modification , fourier transform infrared spectroscopy , amide , elastomer , chemistry , composite material , chemical engineering , organic chemistry , medicine , alternative medicine , pathology , engineering
Highly polar rubbers interact with each other through their active functional groups via condensation or substitution reactions at high temperature. Chlorosulphonated polyethylene (CSM) rubber is a highly reactive rubber, whose reactivity is due to the—SO 2 Cl groups. When CSM reacts with carboxylated nitrile rubber (XNBR), a chemical reaction takes place between the two rubbers at high temperature. Dynamic mechanical analysis shows that CSM and XNBR form a homogeneous blend. Fourier transform infrared (FTIR) studies support that CSM/XNBR (50/50 w/w) is a thermally induced self‐cross‐linking blend, when cross‐linking takes place through carboxylic groups of XNBR and — SO 2 Cl groups or in‐situ generated allyl chloride moieties of CSM. There is a loss of some — CN groups during cross‐linking; this may be due to an attack on the — CN groups by HCl (produced during heating of CSM) in the presence of inherent moisture in the polymers. Due to cross‐linking, an ester or amide type of linkage is formed. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 1761–1768, 1997