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Synthesis and characterization of cholesteric liquid crystal elastomer films

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journal contribution
posted on 23.06.2022, 15:40 authored by Ze-Long Feng, Lu-Xin Fang, Xin-Yi Wan, Yuan-Yuan Gao, Xin-Yu Zhang, Fang-Yuan Li, Mei Tian

A series of liquid crystal elastomer films (the PBC series) have been synthesized by grafting liquid crystal (LC) monomer 4-allyloxybenzoic acid cholesteryl ester (MB) and crosslinking agent [1,1'-biphenyl]-4,4'-diyl bis(undec-10-enoate) (MC) onto polymethylhydrosiloxane catalyzed by hexachloroplatinic acid at 60 °C. The PBC series are cholesteric liquid crystal elastomers (LCEs). The glass transition temperatures (Tg) of the PBC series are between 23-33 °C, and the LC range is above 200 °C. The temperatures of 5% weight loss of the PBC series are above 300 °C, which shows good thermal stability. The PBC series display good orientation. PB3C3 shows a good ability of shape recovery above Tg.

Funding

This work is supported by “the Fundamental Research Funds for the Central Universities” (N182410001 and N180705004) and supported by the National Training Program of Innovation and Entrepreneurship for Undergraduates (Project 202110145008).

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