化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (11) : 186-189. DOI: 10.19817/j.cnki.issn1006-3536.2023.11.041

科学研究

硅氢加成制备主链型液晶聚合物

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Preparation of main-chain liquid crystal polymers by silica-hydrogen addition

Zhu Peng, Chen Quan, Chen Youhui

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Received		Published
2022-07-23		2023-11-20
Issue Date	Revised Date
2023-11-29	2022-07-23

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摘要

自制了含3个苯环的液晶基元,通过硅氢加成,以氢封端的聚硅氧烷为扩链剂制备出主链型液晶聚合物,并且对所得聚合物进行核磁氢谱(¹H-NMR)、差示量热(DSC)、红外光谱(FT-IR)、偏光显微镜(POM)等表征。单体以及聚合物的核磁表明,已经制备出较为纯净的液晶基元单体以及聚合物,FT-IR测试结果表明对应的结构进一步证实了与预期结果相符,对单体以及聚合物的DSC以及结合POM的结果表明单体和硅氢加成后的聚合物都具有良好的液晶性,表明了分子设计的合理性,为合成主链型液晶聚合物提供一些经验基础。

Abstract

Liquid crystal substrates containing three benzene rings were prepared,and then the main-chain liquid crystal polymers were synthesized by silica-hydrogen addition utilizing hydrogen-capped polysiloxane as chain expander.The obtained polymers were characterized by1H-NMR,DSC,FTIR,and POM.The NMR of the monomer and polymer demonstrated that the relatively pure liquid crystal substrate monomers and polymers had been prepared.The FT-IR test results showed that the corresponding structures further confirmed the expected results.The DSC and POM results for monomer and polymer indicated that the monomer and the polymer after silica-hydrogen addition had good liquid crystallinity,which validated the rationality of the molecular design and provided some empirical basis for the synthesis of main-chain liquid crystalline polymers.

关键词

液晶聚合物 / 主链型 / 硅氢加成 / 液晶基元

Key words

liquid crystal polymer / main chain type / silicon-hydrogen addition / liquid crystal substrate

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硅氢加成制备主链型液晶聚合物[J]. 化工新型材料, 2023, 51(11): 186-189 DOI:10.19817/j.cnki.issn1006-3536.2023.11.041

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Bergmann G H F,Finkelmann H,Percec V,et al.Liquid-crystalline main-chain elastomers[J].Macromolecular Rapid Communications,1997,18:353-360.
[2] Finkelmann H,Kock H J,Rehage G.Investigations on liquid crystalline polysiloxanes 3.Liquid crystalline elastomers—a new type of liquid crystalline material[J].Die Makromolekulare Chemie,Rapid Communications,1981,2:317-322.
[3] Halabieh R H E,Mermut O,Barrett C J.Using light to control physical properties of polymers and surfaces with azobenzene chromophores[J].Pure and Applied Chemistry,2004,76:1445-1465.
[4] Kim D Y,Jeong K U.Light responsive liquid crystal soft matters:structures,properties,and applications[J].Liquid Crystals Today,2019,28:34-45.
[5] Kim S N,Shiozawa T,Ogata T,et al.photo-response properties of inverse opal infiltrated with push-pull type azobenzene functionalized polymer liquid crystals[J].Proceedings of Japanese Liquid Crystal Society Annual Meeting,2007,2007:229.
[6] Sun J,Wu S T.Recent advances in polymer network liquid crystal spatial light modulators[J].Journal of Polymer Science Part B:Polymer Physics,2014,52:183-192.
[7] 王秀秀.聚硅氧烷液晶弹性体材料的制备及其性能研究[D].哈尔滨:黑龙江大学,2020.
[8] 杨向勇,陈权,张再兴,等.硫醇-烯点击化学反应制备主链液晶弹性体[J].塑料工业,2020,48(7):5-10.
[9] Cho E H,Luu K,Park S Y.Mechano-actuated light-responsive main-chain liquid crystal elastomers[J].Macromolecules,2021,54:5397-5409.
[10] Wang M,Guo L X,Lin B P,et al.Photo-responsive polysiloxane-based azobenzene liquid crystalline polymers prepared by thiol-ene click chemistry[J].Liquid Crystals,2016,43:1626-1635.
[11] Nie J,Liu X,Yan Y,et al.Supramolecular hydrogen-bonded photodriven actuators based on an azobenzene-containing main-chain liquid crystalline poly(ester-amide)[J].Journal of Materials Chemistry C,2017,5:10391-10398.
[12] Yao J,You Y,Lei Y,et al.Main-chain azo polyaramides with high thermal stability and liquid crystal properties[J].Journal of Polymer Research,2008,16:455-460.
[13] Zhou Y,Wang L,Zhang H.Enhancing the performances of physically cross-linked photodeformable main-chain azobenzene poly(ester-amide)s via chemical structure engineering[J].Polymer Chemistry,2022,13:3713-3725.
[14] Wei P,Lou H,Zhang Y,et al.Synthesis and characterisation of main-chain liquid-crystal polyurethanes containing azo group[J].Liquid Crystals,2020,48:121-130.
[15] Ohm C,Brehmer M,Zentel R.Applications of liquid crystalline elastomers.in liquid crystal elastomers:materials and applications[J].Advances in Polymer Science,2012:49-93.
[16] Kremer F,Skupin H,Lehmann W,et al.Structure,mobility,and piezoelectricity in ferroelectric liquid crystalline elastomers[J].In Advances in Chemical Physics,2000,113:183-201.
[17] Brand H R,Pleiner H,Martinoty P.Selected macroscopic properties of liquid crystalline elastomers[J].Soft Matter,2006,2:182-189.
[18] Bispo M L,Guillon D,Donnio B,et al.Main-chain liquid crystalline elastomers:monomer and gross-linker molecular control of the thermotropic and elastic properties[J].Macromolecules,2008,41:3098-3108.
[19] Brömmel F,Kramer D,Finkelmann H D D C.Preparation of liquid crystalline elastomers[J].Advances in Polymer Science,2012,DOI:10.1007/12-2012-168.
[20] Kuang Z Y,Fan Y J,Tao L,et al.Alignment control of nematic liquid crystal using gold nanoparticles grafted by the liquid crystalline polymer with azobenzene mesogens as the side chains[J].ACS Applied Materials & Interfaces,2018,10:27269-27277.
[21] García-Márquez A,Heinrich B,Beyer N,et al.Mesomorphism and shape-memory behavior of main-chain liquid-crystalline co-elastomers:modulation by the chemical composition[J].Macromolecules,2014,47:5198-5210.
[22] Wiktorowicz S,Damlin P,Salomäki M,et al.Conjugated main chain azo-polymers based on polycyclic aromatic hydrocarbons[J].Macromolecular Chemistry and Physics,2019,220(22):1900303.