中华医学超声杂志

应用化学 ›› 1986, Vol. 0 ›› Issue (3): 13-18.

• 研究论文 • 上一篇    下一篇

分子量分布对双烯类聚合物粘弹性能的影响—Ⅰ.分子量分布对顺-1,-4聚丁二烯粘弹性能的影响

张延寿, 余赋生, 余木火   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1985-02-12 修回日期:1985-07-03 出版日期:1986-06-10 发布日期:1986-06-10
  • 通讯作者: 张延寿

THE INFLUENCE OF MOLECULAR WEIGHT DISTRIBUTION ON THE VISCOELSTIC PROPERTIES OF DIENE POLYMERSⅠ.INFLUENCE OF MOLECULAR WEIGHT DISTRIBUTION ON THE VISCOELASTIC PROPERTIES OF POLY(CIS-1,4-BUTADIENE)

Zhang Yanshou, Yu Fusheng, Yu Muhou   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1985-02-12 Revised:1985-07-03 Published:1986-06-10 Online:1986-06-10

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417

摘要： 本文采用沉淀分级和溶液混合的方法制备分子量相近但分子量分布不同的顺-1,4-聚丁二烯样品,通过凝胶渗透色谱(GPC)和应力松弛的方法,研究分子量分布宽度对生胶粘弹性能的影响,并考察低分子量级份对缠结网络密度的作用和高分子量级份对生胶粘弹性能的影响。结果表明,聚合物本体的稳流切变粘度对分子量分布最为敏感。随分子量分布的变宽,低分子量级份增多,缠结网络密度变小,当高分子量级份增加时,生胶的弹性记忆效应加强。

Abstract: The samples having almost the same molecular weight but different MWD were pre-pared by precipitation fractionating and then mixing in solution. The influence of MWD on the viscoelastic properties of raw rubber was studied using the methods of GPC and stress relaxation. The effect of low molecular weight fractions on the density of chain entanglement networks and the contribution of high molecular weight fractions to the viscoelastic properties of raw rubber were also examined.

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