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Influences of trans ‐polyoctylene rubber on the physical properties and phase morphology of natural rubber/acrylonitrile–butadiene rubber blends
Author(s) -
Nah Changwoon,
Han SeungCheol,
Jo Byung Wook,
Kim Wan Doo,
Chang YoungWook
Publication year - 2002
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.10827
Subject(s) - natural rubber , glass transition , materials science , acrylonitrile , differential scanning calorimetry , composite material , ultimate tensile strength , polymer blend , dynamic mechanical analysis , phase (matter) , elongation , miscibility , nitrile rubber , morphology (biology) , modulus , polymer , polymer chemistry , copolymer , chemistry , organic chemistry , physics , thermodynamics , genetics , biology
The influence of trans ‐polyoctylene rubber (TOR) on the mechanical properties, glass‐transition behavior, and phase morphology of natural rubber (NR)/acrylonitrile–butadiene rubber (NBR) blends was investigated. With an increased TOR level, hardness, tensile modulus, and resilience increased, whereas tensile strength and elongation at break tremendously decreased. According to differential scanning calorimetry and dynamic mechanical analysis, there were two distinct glass‐transition temperatures for a 50/50 NR/NBR blend, indicating the strongly incompatible nature of the blend. When the TOR level was increased, the glass transition of NBR was strongly suppressed. NBR droplets of a few micrometers were uniformly dispersed in the continuous NR phases in the NR/NBR blends. When TOR was added to a 50/50 NR/NBR blend, TOR tended to be located in the NR phase and in some cases was positioned at the interfaces between the NBR and NR phases. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 125–134, 2002