Crystalline structures and thermal properties of poly(ethylene-co-α ,ω-nonconjugated diene)s prepared by zirconocene catalysts

Naofumi Naga, Shinji Okada, Yukio Imanishi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Crystalline structures and thermal properties of poly(ethylene-co-α ,ω-nonconjugated diene)s, [diene = 1,5-hexadiene (HD), 1,7-octadiene (OD), and 1,9-decadiene (DD)] have been investigated in relation to insertion mode of the dienes. In the case of poly(ethylene-co-HD), the copolymer containing high cis-1,3-cyclopentane units shows lower melting point depression with increasing the comonomer content than the copolymers containing high trans-1,3-cyclopentane units. In the case of poly(ethylene-co-OD) and poly(ethylene-co-DD), the copolymers containing pendant vinyl groups show higher ΔHm than that of the copolymers with cyclic units or branching structures. Thermal degradation of the copolymers has been investigated under nitrogen atmosphere and the degradation of the copolymers containing the cyclic structures begins at lower temperature than the copolymers containing pendant vinyl groups.

Original languageEnglish
Pages (from-to)117-124
Number of pages8
JournalPolymer
Volume45
Issue number1
DOIs
Publication statusPublished - 2004 Jan 1

Keywords

  • Crystalline structure
  • Ethylene/α,ω-nonconjugated diene copolymer
  • Thermal property

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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