Chinese Journal of Polymer Science

, Volume 34, Issue 8, pp 1014–1020 | Cite as

Mechanism of polymorph selection during crystallization of random butene-1/ethylene copolymer

  • Yao-tao Wang
  • Pei-ru Liu
  • Ying Lu
  • Yong-feng Men (门永锋)
Papers

Abstract

Starting from an initial sample of butene-1/ethylene copolymer with stable form I’, we examined the nucleation of different crystalline polymorphs (here metastable form II and stable form I’) at different isothermal crystallization temperatures after being melted at different melt temperature (Tmelt). When Tmelt was just above the melting temperature (Tm) of the crystallites, self-seeding took place. There, residue crystallites served as nuclei leading to the crystallization of the same crystalline phase. When Tmelt was a few degrees above the Tm, self-seeding was disabled due to complete melting of the initial crystals. Upon crystallization, the selection of the different polymorphs in this random copolymer was found to depend on an interplay between the domain size of segregated long crystallizable sequences and the size and energy barrier of the critical nucleus of the respective crystalline forms. Our results provide a clear understanding of the polymorphs selection during crystallization of a random copolymer as well as homo-polymers under confinement.

Keywords

Crystallization Random copolymer Polybutene-1 Polymorphism 

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Yao-tao Wang
    • 1
  • Pei-ru Liu
    • 1
  • Ying Lu
    • 1
  • Yong-feng Men (门永锋)
    • 1
  1. 1.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of SciencesUniversity of Chinese Academy of SciencesChangchunChina

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