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高等学校化学研究 ›› 2002, Vol. 18 ›› Issue (1): 52-55.

• Articles • 上一篇    下一篇

Structure and Mechanical Properties of Ethylene-butene Copolymers

QUAN Da-ping, FAN Xin-gang, WANG Hai-hua   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou 510275, P. R. China
  • 收稿日期:2000-08-03 出版日期:2002-01-24 发布日期:2011-08-04
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.29874039).

Structure and Mechanical Properties of Ethylene-butene Copolymers

QUAN Da-ping, FAN Xin-gang, WANG Hai-hua   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou 510275, P. R. China
  • Received:2000-08-03 Online:2002-01-24 Published:2011-08-04
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.29874039).

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被引次数

1

摘要： The crystallinity of ethylene-butene copolymers prepared by copolymerization of ethylene and butene in the presence of a new highly active catalyst was studied by means of DSC, WAXD and DMA. The results show that the melting temperature, the crystallinity and the crystallite size decreased with increasing the content of butene in the copolymers. The copolymers have a high degree of branching, the butene segments are mainly in the amorphous regions of the copolymers, while the polyethylene sequence forms crystal phase acting as crosslinking bondage between the molecules at room temperature. The ethylene-butene copolymers have a low modulus, a low stress and a high strain analogous to the stress-strain behavior of non-cross thermoplastic elastomer.

关键词: Ethylene-butene copolymer, Elastomer, Crystallinity, Stress-strain

Abstract: The crystallinity of ethylene-butene copolymers prepared by copolymerization of ethylene and butene in the presence of a new highly active catalyst was studied by means of DSC, WAXD and DMA. The results show that the melting temperature, the crystallinity and the crystallite size decreased with increasing the content of butene in the copolymers. The copolymers have a high degree of branching, the butene segments are mainly in the amorphous regions of the copolymers, while the polyethylene sequence forms crystal phase acting as crosslinking bondage between the molecules at room temperature. The ethylene-butene copolymers have a low modulus, a low stress and a high strain analogous to the stress-strain behavior of non-cross thermoplastic elastomer.

Key words: Ethylene-butene copolymer, Elastomer, Crystallinity, Stress-strain