抄録
Isothermal crystallization behavior of natural rubber (NR) dispersed in styrene-butadiene rubber (SBR) was studied at -25°C in terms of dilatometry. NR was crosslinked with dicumyl peroxide to prepare lightly crosslinked model compounds to investigate the effect of naturally occurring-branching structure on the crystallization behavior. The morphological feature of NR dispersed in SBR matrix was significantly dependent upon cross-link density, reflecting the empirical relationship between morphology and viscosity associated with cross-link density. The rate of crystallization and value of Avrami index of NR dispersed in SBR matrix was a strong function of domain size.
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