Multimesophase transitions of main-chain liquid crystalline copolymers with strictly alternating fluorocarbon chains,Polymer Chemistry

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Multimesophase transitions of main-chain liquid crystalline copolymers with strictly alternating fluorocarbon chains
Polymer Chemistry ( IF 4.1 ) Pub Date : 2021-1-5 , DOI: 10.1039/d0py01644f
Enjie He _{1,

2,

3,

4,

5} , Kai Tu _{1,

2,

3,

4,

5} , Jiannan Cheng _{1,

2,

3,

4,

5} , Huanjun Lu _{1,

2,

3,

4,

5} , Lifen Zhang _{1,

2,

3,

4,

5} , Zhenping Cheng _{1,

2,

3,

4,

5} , Xiulin Zhu _{1,

2,

3,

4,

5}

Affiliation

Main-chain liquid crystalline polymers seldom develop into a columnar phase, let alone mesophase transitions between the columnar phase and other phases as the temperature changes. Herein, we present a new series of main-chain liquid crystalline copolymers which consist of strictly alternating rod-like aryl ester core, alkyl chain and perfluoroalkyl segments synthesized by photoinduced step transfer-addition and radical-termination (START) polymerization. The mesophases can be adjusted by changing the length of alkyl chains or perfluoroalkyl segments, which have been fully investigated and simulated in terms of molecular arrangements of molecules. Importantly the resultant liquid crystalline copolymers can present rare reversible phase transitions from a hexagonal columnar phase to a rectangular columnar phase and finally to a smectic phase with temperature increasing.

中文翻译：

具有严格交替的碳氟链的主链液晶共聚物的多介相转变

主链液晶聚合物很少发展成柱状相，更不用说随着温度变化，中间相在柱状相和其他相之间的转变。本文中，我们介绍了一系列新的主链液晶共聚物，该共聚物由通过光诱导步骤转移加成和自由基终止（START）聚合合成的严格交替的棒状芳基酯核，烷基链和全氟烷基链段组成。中间相可通过改变烷基链或全氟烷基链段的长度来调节，这些烷基链或全氟烷基链段的长度已根据分子的分子排列进行了充分研究和模拟。

更新日期：2021-01-14

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