摘要
以钛酸丁酯、负载钛/复合铝(AlEt3/Al(i-Bu)3)组成的双组分钛催化体系引发异戊二烯(Ip)聚合,研究了n(AlEt3):n(Al(i-Bu)3)对聚合活性和特性黏数的影响。对聚合物进行溶解分离得到汽油可溶物和不可溶物,分别对汽油可溶物进行红外并且定量分析,对汽油不可溶物进行红外和DSC分析。结果显示,汽油不可溶物部分为反式-1,4-聚异戊二烯,汽油可溶物部分为3,4-聚异戊二烯,且3,4-结构含量及汽油可溶物的特性黏数随着AlEt3比例的提高而升高,而反式-1,4-聚异戊二烯的特性黏数则随着AlEt3量增加而下降。
The polymerization of isoprene（Ip） is initiated by two component ll catalyst system consisting of Ti（n- C4H9O）, and supported titanium/composite aluminum（AIEt3/Al（i-Bu）3）. The influence of n（AIEt3）：n（Al（i-Bu）,） on the polymerization activity and intrinsic viscosity was studied. The polymer is dissolved and separated into soluble part and insoluble part in gasol.ine. The gasoline soluble part is characterized by FT-IR and quantitative analysis and the gasoline insoluble part is characterized by FT-IR and DSC. The results show that the gasoline insoluble part is trans-l,4- polyisoprene, the gasoline soluble part is 3,4-polyisoprene. The 3,4-isomer content and the intrinsic viscosity of the gasoline soluble part increase, but the intrinsic viscosity of trans-l,4-polyisoprene decreases with increase of AIEt3 content.
出处
《化学推进剂与高分子材料》
CAS
2010年第3期49-52,共4页
Chemical Propellants & Polymeric Materials
基金
国家自然科学基金资助项目(20674042)
