Study on Liquid-crystalline Copolymers as a New β-Nucleator to Induce Crystallization Structure of Isotactic Polypropylene

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (6): 1253.

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Study on Liquid-crystalline Copolymers as a New β-Nucleator to Induce Crystallization Structure of Isotactic Polypropylene

HU Jian-She*, KONG Bo, CHAO Chun-Ying, SUN Jing

Institute of Molecular Science and Engineering, School of Science, Northeastern University, Shenyang 110004, China

Received:2009-02-23 Online:2009-06-10 Published:2009-06-10
Contact: HU Jian-She, E-mail: hujs@mail.neu.edu.cn
Supported by:
教育部“新世纪优秀人才支持计划”项目(批准号: NCET-07-0160)和沈阳市自然科学基金(批准号: 1081228-1-02)资助.

Abstract

Abstract:

The effect of a new liquid crystalline copolymer(LCP-H₂) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction. The experimental results show that LCP-H₂ of low mass fraction can induce β-form in iPP. The nucleating activity of LCP-H₂ mainly depended on its content and crystallization temperature. The content of β-form(Kβ) increased with increasing the nucleator content and crystallization temperature, Kβ value reached a maximum value(35%) when the nucleator mass fraction was 0.8% and the crystallization temperature was 125 ℃.

Key words: Polypropylene, Liquid-crystalline copolymer, β-Nucleator, Crystallization structure

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HU Jian-She*, KONG Bo, CHAO Chun-Ying, SUN Jing. Study on Liquid-crystalline Copolymers as a New β-Nucleator to Induce Crystallization Structure of Isotactic Polypropylene[J]. Chem. J. Chinese Universities, 2009, 30(6): 1253.

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Study on Liquid-crystalline Copolymers as a New β-Nucleator to Induce Crystallization Structure of Isotactic Polypropylene

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