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Dispersion of trans‐polyoctenylene in isotactic poly(propylene), 2. Crystallization behaviour

1991; Wiley; Volume: 192; Issue: 2 Linguagem: Inglês

10.1002/macp.1991.021920201

0025-116X

W. Wenig, H. -W. Fiedel,

Synthesis and properties of polymers

Abstract The crystallization kinetics of thin films of isotactic poly(propylene) (iPP) and transpolyoctenylene rubber (TOR) was investigated by optical microscopy. Nucleation densities, Avrami exponents and spherulitic growth rates show specific dependencies on the concentration of TOR in the blend. From the results it is concluded, that at a mass fraction of TOR w TOR = 0,10 the TOR is more finely dispersed in the blend than for other compositions. Due to the subsequent formation of interfaces, the nucleation is found to be predominantly heterogeneous at w TOR = 0,10, while it is preferentially homogeneous at all other compositions.