Modeling induction period of polymer crystallization

Hiroshi Yokota, Toshihiro Kawakatsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We study the possibility of the spinodal decomposition in the induction period of the polymer crystallization. This phenomenon was first reported in an X-ray scattering experiment, and has still been controversial due to various experiments and theories that support or deny the phenomenon. In this article, we explain the condition for the spinodal decomposition to occur in polymer melts by deriving a Ginzburg-Landau model of the free energy as a functional of the density and the orientation of the segments, where we introduce the excluded volume and the nematic interactions through a combination of the random phase approximation and the transfer matrix for the polymer conformation. We show that, upon elimination of the degrees of freedom of the orientation, the nematic interaction reduces to an effective attraction whose strength increases with the stiffness of the polymer chain. Such an attraction induces spinodal decomposition especially for stiff polymer chain case.

Original languageEnglish
Pages (from-to)189-200
Number of pages12
JournalPolymer
Volume129
DOIs
Publication statusPublished - 2017 Oct 27

Keywords

  • Induction period
  • Polymer crystallization
  • Spinodal decomposition

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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