Polysiloxane-Based Liquid Crystalline Polymers and Elastomers Prepared by Thiol–Ene Chemistry
作者:Hong Yang、Ming-Xia Liu、Yue-Wei Yao、Ping-Yang Tao、Bao-Ping Lin、Patrick Keller、Xue-Qin Zhang、Ying Sun、Ling-Xiang Guo
DOI:10.1021/ma400462e
日期:2013.5.14
A series of side-chain liquid crystalline polymers (LCPs) with polysiloxane backbones have been synthesized by grafting mesogenic monomers to poly[3-mercaptopropylmethylsiloxane] (PMMS) via thiol–ene click chemistry. Their properties were studied in detail by a combination of 1H NMR, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, polarized optical microscopy
通过将介晶单体通过硫醇-烯点击化学接枝到聚[3-巯基丙基甲基硅氧烷](PMMS)上,已经合成了具有聚硅氧烷骨架的一系列侧链液晶聚合物(LCP)。通过组合1对它们的性质进行了详细研究1 H NMR,凝胶渗透色谱,热重分析,差示扫描量热法,偏振光学显微镜和小角X射线散射。与需要贵金属催化剂铂的传统氢化硅烷化方法相比,这种新设计的硫醇-烯方案可在良性条件下生产仅含反马尔科夫尼科夫加成产物的基于聚硅氧烷的LCP。此外,通过控制PMMS和介晶单体的摩尔比,可以将PMMS基LCP进行部分功能化,同时保留剩余的巯基,这些巯基可以进一步用作交联位点,以制备聚硅氧烷基液晶弹性体(LCE)。除了制备向列向各向同性转变温度时最大收缩率为42%的LCE纤维外,