高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (1): 139.

• 论文 • 上一篇    下一篇

苯乙烯-丙烯嵌段共聚物等温结晶动力学的研究

许光学, 林尚安   

  1. 广州中山大学高分子研究所, 广州 510275
  • 收稿日期:1994-04-21 修回日期:1994-08-01 出版日期:1995-01-24 发布日期:1995-01-24
  • 通讯作者: 许光学,男32岁,博士,讲师.
  • 作者简介:林尚安
  • 基金资助:

    国家自然科学基金

Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer

XU Guang-Xue, LIN Shang-An   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275
  • Received:1994-04-21 Revised:1994-08-01 Online:1995-01-24 Published:1995-01-24

摘要: 用DSC法研究苯乙烯-丙烯嵌段共聚物(iPS-b-iPP)的等温结晶动力学。结果表明,在所选择的结晶温度(127~132℃)范围内,共聚物很好地符合Avrami动力学方程;共聚物结晶温度、结晶速率、结晶成核和生长方式都与共聚物结构和组成比有关,随着嵌段共聚物中iPS段含量的增加,结晶速率和Avranu指数(n)明显降低。

关键词: 苯乙烯-丙烯共聚物, DSC, 等温结晶动力学

Abstract: The isothermal crystallization Kinetics of styrene/propylene block copolymer(iPSb-iPP)has been investigated by DSC. The results indicated that the kinetics of isothermal crystallization for all of samples was fitted for the Avrami,equation quite well within selected crystallization temperature(127-132℃),and that the crystallization temperature, crystallization rate and crystal growing mechanism were affected by the composition ratio of iPS-biPP. With the increase of the content of iPSblock in iPS-b-iPP copolymers crystallization rate(G)and Avrami exponent(n) were significantly reduced.In addition, a discussion about the relationship between the growing mechanism of crystals and the composition ratio of iPSb-iPPwas made based on the Avrami exponents and TEM.

Key words: Styrene-propylene copolymer, DSC, Isothermal crystallization kinetics

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