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研究了一种以非极性烃为溶剂,α-甲基萘锂复合物为基体的双锂催化剂LM-T作为引发剂,在环已烷中使丁二烯或丁二烯/苯乙烯进行双活性阴离子聚合,用精制的环氧丙烷终止,合成了双端羟聚丁二烯(HTPB)和双端羟SBS(HTSBS)两种遥爪聚合物。研究结果表明,聚合物分子量和羟基含量可由催化剂用量调整,官能度达到或接近2。分子量分布由GPC测定,宽度指数D=1.4左右。聚合物微观结构通过IR和H-HMR测定,1.4-聚丁二烯含量达到75%左右。因此,HTPB和HTSBS是两种1.4含量较高、分子量分布较窄的离子型遥爪聚合物。
A dual lithium catalyst LM-T based on nonpolar hydrocarbon as solvent and α-methylnaphthalene-lithium complex was used as initiator to make butadiene or butadiene / styrene in cyclohexane Double living anion polymerization, terminated with purified propylene oxide, synthesized two telechelic polymers, HTPB and HTSBS. The results show that the molecular weight of the polymer and hydroxyl content can be adjusted by the amount of catalyst, the functionality reaches or approaches 2. The molecular weight distribution is measured by GPC with a width index D of about 1.4. The microstructure of the polymer was measured by IR and H-HMR, and the content of 1.4-polybutadiene reached about 75%. Therefore, HTPB and HTSBS are two kinds of ionic telechelic polymers with higher content of 1.4 and narrower molecular weight distribution.