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以六亚甲基亚胺锂(LHMI)与二乙烯基苯(DVB)合成的氮官能化多锂(简称Li)为引发剂,N,N,N′,N′-四甲基乙二胺(TMEDA)为极性调节剂,环己烷为溶剂,制备了带有氮官能化基团的星形无规苯乙烯-异戊二烯-丁二烯共聚物(SIBR),用核磁共振法进行了表征,并分析了TMEDA用量、聚合温度、引发剂浓度及DVB/Li(摩尔比)对SIBR微观结构和玻璃化转变温度(Tg)的影响。结果表明,在DVB/LHMI(摩尔比)为0.8的条件下,SIBR中有C—N存在,并且为臂数不等的星形聚合物;随着TMEDA用量的增加和聚合温度的降低,SIBR中非1,4-结构含量增加,Tg提高;在实验范围内引发剂浓度和DVB/Li对SIBR中非1,4-结构含量和其Tg影响不大。
Nitrogen-functionalized poly-lithium (referred to as Li) synthesized by using hexamethyleneimine lithium (LHMI) and divinylbenzene (DVB) as initiator and N, N, N ’, N’-tetramethylethylenediamine (TMEDA) as polar modifier and cyclohexane as solvent, a star-shaped random styrene-isoprene-butadiene copolymer (SIBR) with nitrogen functional groups was prepared. The effects of TMEDA dosage, polymerization temperature, initiator concentration and DVB / Li (molar ratio) on the microstructure and glass transition temperature (Tg) of SIBR were analyzed. The results show that there is C-N in the SIBR under the DVB / LHMI (molar ratio) of 0.8, which is a star polymer with different number of arms. With the increase of the amount of TMEDA and the decrease of the polymerization temperature, the SIBR The content of 1,4-naphthalene increased with the increase of Tg. In the experimental range, the concentration of initiator and DVB / Li had little effect on the content of non-1,4-structure and Tg in SIBR.