中华医学超声杂志

应用化学 ›› 1984, Vol. 0 ›› Issue (2): 41-45.

• 研究论文 • 上一篇    下一篇

丙烯酸类单体与倍半铝的络合常数及其与共轭双烯烃的交替共聚

韩孝族, 郭凤春, 王大伟   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1984-01-21 修回日期:1984-02-09 出版日期:1984-06-10 发布日期:1984-06-10

THE COMPLEX CONSTANTS OF ACRYLIC MONOMERS WITH ETHYLALUMINIUM SESQUICHLORIDE AND THE RATES OF ALTERNATING COPOLYMERIZATION OF THESE MONOMERS WITH CONJUGATED DIENES

Han Xiaozu, Guo Fengchun, Wang Dawei   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1984-01-21 Revised:1984-02-09 Published:1984-06-10 Online:1984-06-10

PDF

372

被引次数

2

摘要： 用紫外光谱法测定了丙烯腈、丙烯酸甲酯、甲基丙烯酸甲脂和甲基丙烯酸丁酯与倍半铝 的络合常数(K),其值分别为123,82.6,50和17.51/mol,它们和单体的e值有关:K=2.57 exp(1.39e)。 丙烯酸类单体与共轭双烯在倍半铝存在下的交替共聚反应速度,随络合常数值及两种单体e值之差增大而增大,说明单体极性效应在这种给电子—受电子单体共聚中起重要作用。

Abstract: The complex constants(K)of acrylonitrile, methyl acrylate, methyl methacrylate and butyl methacrylate with ethylaluminium sesquichloride have been evaluated by UV spectrum method.They are dependent upon the e values of acrylic monomers;K=27.5 exp(1.39e)and have the values of 123, 82.6, 50 and 17.5 l/mole, respectively. The rates of alternating copolymerization of acrylic monomers with conjugated dienes in the presence of ethylaluminium sesquichloride increase with increasing K and the diffrence of e values between two monomers. It is shown that for donor-acceptor monomers the polar effect of monomer plays an important role in the copolymerization.

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