Effects of main chain and acceptor content on phase behaviors of hydrogen-bonded main-chain/side-chain combined liquid crystalline polymers
Effects of main chain and acceptor content on phase behaviors of hydrogen-bonded main-chain/side-chain combined liquid crystalline polymers
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DOI：
10.1016/j.polymer.2016.01.018
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发表时间：
2016-02
期刊：
影响因子：
4.6
通讯作者：
Shuai-Qi Yang;Wei Qu;Hongbing Pan;Yu-dong Zhang;Shi-jun Zheng;Xinghe Fan;Zhihao Shen
中科院分区：
文献类型：
--
作者：
Shuai-Qi Yang;Wei Qu;Hongbing Pan;Yu-dong Zhang;Shi-jun Zheng;Xinghe Fan;Zhihao Shen
主链/侧链复合型液晶聚合物（MCSCLCP）通常合成困难，聚合度较低，这给研究其结构与性能关系带来了困难。为了解决这一问题，我们通过氢键（H-B）的方法制备了一系列含有液晶基元的液晶聚合物（MJLCP）。具有苯并菲（Tp）单元的吡啶衍生物是H-B受体。除了温度依赖性之外，所得复合物的相行为强烈地受H-B受体的含量和MJLCP的侧链核的刚性的影响。所得复合物表现出不同的相结构：（1）由超分子MJLCP链作为一个整体形成的柱状晶相或近晶A（SmA）相;（2）分级纳米结构，包括整个聚合物链的六方柱状相或SmA相加上与Tp部分相关的分散相。
Main-chain/side-chain combined liquid crystalline polymers (MCSCLCPs) are usually difficult to synthesize and their degrees of polymerization are relatively low, which bring difficulties in studying their structure–property relationships. In order to solve this problem, we prepared a new series of MCSCLCPs containing mesogen-jacketed liquid crystalline polymer (MJLCP) main chains via hydrogen-bonding (H–B). A pyridine derivative with a triphenylene (Tp) unit is the H–B acceptor. In addition to the temperature dependence, the phase behavior of the resulting complex is strongly influenced by the content of the H–B acceptor and the rigidity of the side-chain core of the MJLCP. The resulting complexes exhibit different phase structures: (1) a columnar nematic phase or a smectic A (SmA) phase formed by the supramolecular MJLCP chain as a whole; (2) hierarchical nanostructures including a hexagonal columnar phase or a SmA phase of the whole polymer chain plus a discotic nematic phase associated with the Tp moieties.