论文部分内容阅读
本文比较了各种氯代钒酸酯—三异丁基铝体系催化丁二烯、丙烯交替共聚的活性,得出氯代钒酸新戊酯—三异丁基铝体系催化活性最高。能制得高分子量的交替共聚物。研究了该催化体系的特点和聚合规律,及提高共聚物〔η〕的途径。在—45—-76℃温度范围内可以制得〔η〕为1.7—2.6dl/g 的丁丙交替共聚物,单体转化率在80%以上。通过分析鉴定,证明产物交替度在95%左右,反式1.4丁二烯单元含量在95%以上。
In this paper, we compared the activity of various chlorovanadate-triisobutylaluminum systems for the alternate copolymerization of butadiene and propylene. The results showed that the catalytic activity of the neopentyl chloro vanadate-triisobutylaluminum system was the highest. Can produce high molecular weight alternating copolymer. The characteristics and polymerization rules of the catalyst system and the ways to increase the copolymer [η] were studied. In the -45 - 76 ℃ temperature range can be obtained [η] of 1.7-2.6dl / g alternating copolymer of butadiene, the monomer conversion rate of 80% or more. Through the analysis and identification, it is proved that the degree of product alternation is about 95% and the content of trans 1.4 butadiene unit is over 95%.