应用化学 ›› 1983, Vol. 0 ›› Issue (1): 22-27.

• 研究论文 • 上一篇    下一篇

低乙烯基聚丁二烯橡胶的合成和表征

林云青, 李生田, 张宏放, 孙树海, 胡振亚   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1983-04-12 修回日期:1983-05-31 出版日期:1983-12-10 发布日期:1983-12-10

SYNTHESIS AND CHARACTERIZATION OF POLYBUTADIENE RUBBER WITH LOW VINYL STRUCTURE CONTENT

Lin Yunqing, Li Shengtian, Zhang Hongfang, Sun Shuhai, Hu Zhenya   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1983-04-12 Revised:1983-05-31 Published:1983-12-10 Online:1983-12-10

摘要: 以钴催化体系为催化剂,用两步聚合法合成了1,2-链节含量范围在7—16%的低乙烯基聚了二烯橡胶。对聚合产物的表征结果表明,聚合物中存在着间同1,2-聚丁二烯的微晶,这些微晶起晶种的作用,能促进产物在低温下的结晶;当胶中1,2-链节含量小于10%时,不溶于CS2的级分较少,加入1,2-聚合催化剂后主要生成顺1,4-间同1,2-丁二烯嵌段共聚物;当1,2-链节含量高于10%时,CS2不溶物量较多,这时除上述嵌段物外尚可能生成少量间同1,2-聚了二烯均聚物。

Abstract: Cis-1,4-polybutadiene rubber with vinyl content ranging from 7 to 16% in a form of syndiotactic-1,2-polybutadiene blocks was synthesized with cobalt catalyst systems through two-stage polymerization. The po-lymer obtained has been characterized by their solubility behavior, infra-red spectrum, X-ray diffraction patterns, incipient crystallization tempera-ture and half crystallization time.