摘要
路易斯碱经常被用作结构调节剂以提高丁二烯阴离子聚合的1,2-选择性.本研究报道了四种新型不同烷基取代基的N,O-双齿路易斯碱,其化学名称分别为1-(2-甲氧基乙基)-哌啶(MOD 1)、1-(2-乙氧基乙基)-哌啶(MOD 2)、1-(2-丙氧基乙基)-哌啶(MOD 3)、1-(2-丁氧基乙基)-哌啶(MOD 4).对比研究所合成的新型结构调节剂与5种已报道的常见结构调节剂对丁二烯阴离子聚合的影响,并探究了不同调节剂的用量、聚合温度等因素对聚合反应的影响规律.结果表明,新设计的N,O-双齿结构调节剂能够在较少的用量下达到较好的聚丁二烯1,2-结构的调节效果,且调节能力稳定随聚合温度变化波动小.
Lewis bases are frequently employed as polar modifiers to enhance the 1,2-selectivity of butadiene anionic polymerization.In this work,we report four novel N,O-bidentate Lewis bases bearing different alkyl substituents:1-(2-methoxyethyl)piperidine(MOD 1),1-(2-ethoxyethyl)piperidine(MOD 2),1-(2-propoxyethyl)piperidine(MOD 3),and 1-(2-butoxyethyl)piperidine(MOD 4).A comparative study was conducted between these newly synthesized polar modifiers and five commonly used,previously reported modifiers,focusing on their effects on the anionic polymerization of butadiene.Additionally,we investigated how the dosage of various modifiers and the polymerization temperature influence the polymerization behavior.The results show that the newly designed N,O-bidentate polar modifiers can achieve a high degree of 1,2-structural regulation in polybutadiene at relatively low dosage levels.Their regulatory effectiveness remains stable across different polymerization temperatures,demonstrating both high efficiency and excellent stability.
作者
李欣芮
汤健
张澳
刘二波
华静
Xin-rui Li;Jian Tang;Ao Zhang;Er-Bo Liu;Jing Hua(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266000)
出处
《高分子学报》
北大核心
2025年第9期1529-1536,共8页
Acta Polymerica Sinica
基金
国家自然科学基金项目(基金号52373010)资助.
关键词
阴离子聚合
结构调节剂
丁二烯
微观结构
Anionic polymerization
Polar modifiers
Butadiene
Microstructure
