中华医学超声杂志

应用化学 ›› 1986, Vol. 0 ›› Issue (5): 69-74.

• 研究论文 • 上一篇    下一篇

钴系催化剂合成液体聚丁二烯的13C-NMR研究—端基、支化结构以及α-烯烃调聚机理

张喜田1, 裴奉奎1, 焦书科2, 胡力平2   

  1. 1. 中国科学院长春应用化学研究所;
    2. 北京化工学院应用化学系
  • 收稿日期:1985-04-10 修回日期:1985-10-30 出版日期:1986-10-10 发布日期:1986-10-10
  • 通讯作者: 张喜田

13C-NMR STUDY ON THE LIQUID POLYBUTADIENE SYNTHESIZED BY COBALT BASED CATALYST SYSTEMEND GROUP BRANCHED STRUCTURE AND MODIFICATION MECHANISM BY α-OLEFINE

Zhang Xitian1, Pei Fengkui1, Jiao Shuke2, Hu Liping2   

  1. 1. Changchun Institute of Applied Chemistry, Academia Sinica;
    2. Department of Applied Chemistry, Beijing Institute of Chemical Technology
  • Received:1985-04-10 Revised:1985-10-30 Published:1986-10-10 Online:1986-10-10

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摘要： 本文研究了Co(Nap)2-Al(i-Bu)3-PhCCl3催化体系合成的液体聚丁二烯(PB)的13C-NMR谱以及α-烯烃调节分子量的PB13C-NMR谱,观察到TPB的端基结构,据此探讨了链引发机理,证明了α-烯烃是PB分子量的调节剂。根据化学位移计算和分子量测定结果,确认PB存在支化结构,并探讨了支化机理。

Abstract: With the aid of 13C-NMR spectra of liquid polyoutadiene(PB), catalytically synthe-sized by Co(Nap)2-Al(i-Bu)3-PhCCl3, some terminal structures of PB Ⅰ-Ⅵ and two branch structures ⅩⅥ and ⅩⅦ have been identified, providing valuable information for chain initiation mechanism. On the basis of branch structure the number average molecular weight of samples was calculated and compared with the result obtained from VPO measurement.The 13C NMR spectra of PB modified by α-olefine reveal that α-ole-fine only modifies the molecular weight of the polymer, it does not copolymerize with butadiene.

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