βα-bifurcation of growth during the spherulitic crystallization of polypropylene

J. Varga, Y. Fujiwara, A. Ille

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Spontaneous β to α polymorphic transition occurs from pinpoint nuclei on the periphery of the growing β-spherulite of polypropylene at a high crystallisation temperature (βα-bifurcation of growth), and its relative occurrence frequency increased with rising temperature. This is accompanied by a simultaneous decrease in growth rate. The phenomenon of βα-bifurcation of growth was interpreted through secondary βα-nucleation and the necessary energetic conditions and temperature dependence of this have been discussed.

Original languageEnglish
Pages (from-to)255-271
Number of pages17
JournalPeriodica Polytechnica Chemical Engineering
Volume34
Issue number4
Publication statusPublished - Jan 1 1990

ASJC Scopus subject areas

  • Chemical Engineering(all)

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