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Compatibilization of SBR/NBR blends using chemically modified styrene‐ co ‐butadiene rubber Part 2. Effect of compatibilizer loading
Author(s) -
Ramesan M T,
Alex Rosamma
Publication year - 2001
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.775
Subject(s) - natural rubber , materials science , compatibilization , styrene butadiene , composite material , miscibility , swelling , differential scanning calorimetry , polymer blend , nitrile rubber , dynamic mechanical analysis , acrylonitrile , glass transition , polymer , styrene , copolymer , physics , thermodynamics
The present work focuses on the compatibization of styrene‐ co ‐butadiene rubber (SBR)/acrylonitrile‐ co ‐butadiene rubber (NBR) blends with dichlorocarbene modified styrene‐ co ‐butadiene rubber (DCSBR) as a function of concentration of compatibilizer and composition of the blend. FTIR studies, differential scanning calorimetry and dynamic mechanical analysis reveal molecular level miscibility in the blends in the presence of compatibilizer. The formation of interfacial bonding is assessed by analysis of swelling behaviour, cure characteristics, stress–strain data and mechanical properties. These studies show that the compatibilizing action of DCSBR becomes more prominent as the proportion of NBR in the blend increases. The resistance of the vulcanizate towards thermal and oil ageing improved with compatibilization. The change in technological properties is correlated with the crosslink density of the blends assessed from swelling and stress–strain data. © 2001 Society of Chemical Industry