Synthesis and Characterization of New Liquid Crystalline Thermoplastic Elastomers Containing Mesogen-Jacketed Liquid Crystalline Polymers
作者:Zhen-Yu Zhang、Qi-Kai Zhang、Zhihao Shen、Jian-Peng Yu、Yi-Xian Wu、Xing-He Fan
DOI:10.1021/acs.macromol.5b02630
日期:2016.1.26
kind of ABA triblock copolymer containing a mesogen-jacketed liquid crystalline polymer (MJLCP), poly2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene} (PMPCS), as the hard blocks and polybutadiene (PB) as the soft block. The triblock copolymer, PMPCS-b-PB-b-PMPCS (M-B-M), was synthesized by ring-opening metathesis polymerization in the presence of a chain transfer agent and atom transfer radical polymerization
为了提高热塑性弹性体(TPE)的高温性能,我们设计并合成了一种新型的ABA三嵌段共聚物,该共聚物包含介晶夹层液晶聚合物(MJLCP),聚2,5-bis [(4- (PMPCS)作为硬嵌段,而聚丁二烯(PB)作为软嵌段。在链转移剂和原子转移自由基聚合的存在下,通过开环易位聚合反应合成了三嵌段共聚物PMPCS- b -PB- b -PMPCS(MBM)。玻璃化温度(T g三嵌段共聚物中PMPCS硬嵌段的)为110–118°C。另外,PMPCS的液晶(LC)相在热分解之前是稳定的。所有的三嵌段共聚物均形成层状微相分离的结构,如小角度X射线散射和透射电子显微镜结果所证明。质量分数为PMPCS的55%的三嵌段共聚物(MBM-55)表现出LC热塑性弹性体(LCTPE)的典型性能。MBM-55的最大断裂伸长率和拉伸强度分别为736%和10.6 MPa,在300%时的拉伸强度为6.9 MPa。在PMPCS的T