| 稀土催化剂制备条件对丁二烯与异戊二烯共聚合的影响 |
| Effects of Preparation Conditions of Rare Earth Catalyst on Copolymerization of Butadiene and Isoprene |
| 投稿时间：2017-09-11 修订日期：2017-10-09 |
| DOI： |
| 中文关键词: 丁二烯 异戊二烯 新癸酸钕 三异丁基铝 氯化二乙基铝 稀土催化剂 催化剂陈化 |
| 英文关键词: butadiene isoprene Nd（vers）3 Al（i-Bu）3 Al（i-Bu）2Cl rare earth catalyst catalyst aging |
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| 中文摘要: |
| 采用溶液聚合法在己烷溶剂中以新癸酸钕（简称Nd）/三异丁基铝（简称Al）/氯化二乙基铝（简称Cl）催化体系合成丁二烯-异戊二烯共聚物，研究催化剂制备过程中陈化方式、陈化时间、陈化温度、异戊二烯单体加入量和催化剂组分配比对丁二烯与异戊二烯共聚合的影响。结果表明：采用Nd/Al/Cl催化体系可以合成高顺式丁戊无规共聚物，催化剂制备条件对共聚物微观结构的影响不大，聚丁二烯和聚异戊二烯链节中的顺式1，4-结构摩尔分数均大于0.96；在催化剂制备过程中加入少量异戊二烯单体，可提高催化剂的聚合活性；共聚物具有高数均相对分子质量（38.8×104～42.1×104）；当Al/Nd摩尔比为15、Cl/Nd摩尔比为1.5时，丁戊共聚物的收率较大，相对分子质量分布最窄。 |
| 英文摘要: |
| Copolymerization of butadiene and isoprene in hexane by solution polymerization was studied with Nd（vers）3-Al（i-Bu）3-Al（i-Bu）2Cl catalytic system.The effects of catalyst preparation conditions such as aging method，aging time，aging temperature，monomer amount and catalyst ratio on the copolymerization of butadiene and isoprene were investigated.The results showed that，butadiene-isoprene random copolymer with high cis-content could be synthesized by Nd/Al/Cl catalytic system，and the catalyst preparation conditions had little effect on the microstructure of butadiene-isoprene copolymers.The mole ratios of cis-1 ，4-structure in polybutadiene and polyisoprene chains were all above 0.96.The addition of a small amount of monomer isoprene in the preparation of catalyst could improve the polymerization activity of the catalyst.The butadiene-isoprene copolymers had high number-average molecular weight（38.8×104～42.1×104）. When the mole ratio of Al/Nd was 15 and the molar ratio of Cl/Nd was 1.5，the yield of butadiene-isoprene copolymer was large，and the molecular weight distribution was the narrowest. |
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