CAJ | 학술논문

采用Ziegler-Natta配位聚合制备了高顺式聚异戊二烯，主要考察了非均相催化体系四氯化钛-三异丁基铝二组分催化剂的预制方法以及催化剂预制条件对异戊二烯体系聚合规律的影响。讨论了催化剂配比、预制催化剂温度和陈化温度对催化剂活性及聚合物的凝胶含量、特征黏度、微观结构含量等方面的影响。同时讨论了催化剂用量、聚合温度和聚合时间对聚合活性及聚合物的凝胶含量、特征黏度、微观含量等方面的影响。研究结果表明，合成高cis-1,4-聚异戊二烯的最佳实验条件为：Al/Ti摩尔比1.0，催化剂预制温度?40℃，陈化2 h，Ti/Ip摩尔比6×10?3，聚合温度50℃，聚合时间5 h。所得聚合物最高转化率为87.1%，cis-1,4结构含量为91.76%。
채용Ziegler-Natta배위취합제비료고순식취이무이희，주요고찰료비균상최화체계사록화태-삼이정기려이조분최화제적예제방법이급최화제예제조건대이무이희체계취합규률적영향。토론료최화제배비、예제최화제온도화진화온도대최화제활성급취합물적응효함량、특정점도、미관결구함량등방면적영향。동시토론료최화제용량、취합온도화취합시간대취합활성급취합물적응효함량、특정점도、미관함량등방면적영향。연구결과표명，합성고cis-1,4-취이무이희적최가실험조건위：Al/Ti마이비1.0，최화제예제온도?40℃，진화2 h，Ti/Ip마이비6×10?3，취합온도50℃，취합시간5 h。소득취합물최고전화솔위87.1%，cis-1,4결구함량위91.76%。
The high cis-1,4-polyisoprene is prepared by Ziegler-Natta coordination polymerization. The effect of preparation method and condition of heterogeneous TiCl4-Al(i-Bu)3 two component catalyst on isoprene polymerization are investigated. The influence of several parameters on the catalytic activity, the gel content, intrinsic viscosity, microstructure and cis-1,4-content of the polyisoprene is examined in detail, including mole ratio of catalyst component, prefabricate temperature and aging time as well as catalyst dosage, polymerization temperature and time. The results show that the optimum conditions of catalyst preparation are as follows: the molar ratio of Al/Ti is 1.0, the temperature of prefabricate is at?40℃, the aging time is 2 h at room temperature, molar ratio of Ti/Ip(catalyst content)is 6×10?3, the polymerization for 5 h at 50℃. Under these condition, the monomer conversion is 87.1%in the polymerization, the microstructure cis-1,4 content in obtained polymer is up to 91.76%.