摘要
1,2-结构液体聚丁二烯具有优异的介电性能,可用于高频印刷电路板,以正丁基锂(n-BuLi)为引发剂、二乙二醇二甲醚(2G)为调节剂,采用活性阴离子聚合法,在微通道反应器中合成了1,2-结构液体聚丁二烯。采用GPC和^(1)HNMR对合成的聚丁二烯的数均相对分子质量、相对分子质量分布(PDI)及1,2-结构相对含量进行了测试,考察了聚合温度、2G用量及调节剂复配对1,2-结构液体聚丁二烯的分子结构参数的影响。结果表明,随聚合温度(10~20℃)的升高,1,2-结构液体聚丁二烯的1,2-结构相对含量下降;以2G为调节剂时,随着2G用量的增加,1,2-结构液体聚丁二烯的1,2-结构相对含量增加。当n(2G)∶n(n-BuLi)=5∶1时,1,2-结构液体聚丁二烯的1,2-结构相对含量达到88.2%;当以2G和三乙胺(TEA)为复合调节剂、n(2G)∶n(TEA)∶n(n-BuLi)=1∶1∶1时,PDI=1.09,1,2-结构液体聚丁二烯的1,2-结构相对含量达到87.3%。
1,2-Structured liquid polybutadiene can be used in high frequency printed circuit boards due to its excellent dielectric properties.In this research,1,2-structured liquid polybutadiene was synthesized from reactive anionic polymerization in a microchannel reactor using n-butyllithium(n-BuLi)as initiator and diethylene glycol dimethyl ether(2G)as modifier,and analyzed by GPC and ^(1)HNMR for the numberaverage relative molecular mass,relative molecular mass distribution(PDI)and the relative content of 1,2-structure.The effects of polymerization temperature,2G dosage and modifier combination on the molecular structure parameters of 1,2-structured liquid polybutadiene were investigated.The results showed that the relative content of 1,2-structure decreased with the increase of polymerization temperature(10~20℃),while increased with the increase of 2G dosage.When n(2G)∶n(n-BuLi)=5∶1,the relative content of 1,2-structure reached 88.2%.When n(2G)∶n(TEA)∶n(n-BuLi)=1∶1∶1 was used as composite regulator,PDI=1.09,with the relative content of 1,2-structure reaching 87.3%.
作者
李龙昊
赵忠夫
朱强文
胡元鸿
麻婧祎
张春庆
LI Longhao;ZHAO Zhongfu;ZHU Qiangwen;HU Yuanhong;MA Jingyi;ZHANG Chunqing(School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《精细化工》
北大核心
2026年第3期501-505,共5页
Fine Chemicals
关键词
微通道反应器
聚丁二烯
调节剂
二乙二醇二甲醚
阴离子聚合
功能材料
microchannel reactor
polybutadiene
regulators
diethylene glycol dimethyl ether
anionic polymerization
functional materials
