中华医学超声杂志

应用化学 ›› 1987, Vol. 0 ›› Issue (5): 45-48.

• 研究论文 • 上一篇    下一篇

X-射线衍射法研究稀土催化丁二烯异戊二烯共聚物低温下的结晶

魏学军, 莫志深, 张宏放, 杨毓华   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1986-06-04 修回日期:1986-10-23 出版日期:1987-10-10 发布日期:1987-10-10

ON THE LOW TEMPERATURE X-RAY DIFFRACTION OF COPOLYMER OF BUTADIENE AND ISOPRENE PREPARED WITH RARE-EARTH CATALYST SYSTEM

Wei Xunjun, Mo Zhishen, Zhang Hongfan, Yan Yuhua   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1986-06-04 Revised:1986-10-23 Published:1987-10-10 Online:1987-10-10

PDF

370

被引次数

1

摘要： 本工作用WAXD法对以环烷酸稀土盐为主的催化剂合成的丁二烯和异戊二烯共聚物(Ln-PBI)在低温下的结晶行为进行了研究。Ln-PBI室温下为非晶态,在低温下,异戊二烯含量(重量)>20%时不能生成结晶;含量(重量)<20%时,可观察到结晶的生成。并且结晶度随结晶温度的下降而增加,晶格常数则逐渐减小。Ln-PBI基本上保持了Ln-PB单斜晶系的结晶结构,其晶区由Ln-PB链段所贡献。

Abstract: Using WAXD method, the crystalline behaviours of poly (butadiene-co-isoprene) (Ln-PBI) at low temperature were studied. When the weight ratio of butadiene/isoprene is <80/20, the Ln-PBI becomes noncrystalline even at very low temoerature(-110℃). However,when weight ratio is >80/20, the crystallinity of Ln PBI increases with decrease of crystallization temoerature, but the lattice parameters changes insignificantly. The crystal of Ln-PBI is considered mainly contributed by Ln-PB sequences and still belongs to monoclinic system.

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