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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (08): 993-998. 上一篇    下一篇

研究论文

Y型星形杂臂甲壳型液晶聚合物的合成及其液晶行为研究

陈建芳*,1,2，凌爱华2，王霞瑜2   

  1. (1湖南工程学院化学化工学院 湘潭 411104)
    (2湘潭大学化学学院高分子材料研究所 湘潭 411105)
  • 投稿日期:2010-10-04 修回日期:2010-12-09 发布日期:2010-12-13
  • 通讯作者: 陈建芳 E-mail:cjf1228@yahoo.com.cn

Synthesis and Their Liquid Crystalline Behavior of Y-Type Miktoarm Star Mesogen-jacketed Liquid Crystalline Copolymer

Chen Jianfang*,1,2 Ling Aihua2 Wang Xiayu2   

  1. (1 Department of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104)
    (2 Institute of Polymer Science, College of Chemistry, Xiangtan University, Xiangtan 411105)
  • Received:2010-10-04 Revised:2010-12-09 Published:2010-12-13

PDF

1307

被引次数

8

通过原子转移自由基聚合(ATRP)与ATRP衍生物化学修饰结合的方法, 合成了含一条聚苯乙烯(PS)臂、两条聚[乙烯基对苯二甲酸二(对甲氧基苯酚)酯](PMPCS)臂的Y型星形杂臂甲壳型液晶聚合物PS(PMPCS)2. 采用核磁共振谱(1H NMR)和凝胶渗透色谱(GPC)手段确定了聚合物的基本结构, 所得聚合物为接近单分散的星形杂臂聚合物. 采用热分析(DSC)、热台偏光显微镜(POM)和X衍射仪(WXAD)研究了此类星形杂臂共聚物的热致液晶行为. 液晶性研究显示, 其液晶性与刚性链段PMPCS的长度密切相关, 只有当杂臂共聚物中刚性PMPCS链段达到一定长度后才出现液晶性.

关键词: 星形杂臂, 原子转移自由基聚合(ATRP), 甲壳型液晶, 液晶行为

Y-type miktoarm star Mesogen-jacketed liquid crystal copolymers carrying one polystyrene (PS) and two poly{2,5-bis[(4-methoxyphenyl)-oxycarbonyl] styrene} arms (PMPCS) were synthesized by combination of atom transfer radical polymerization (ATRP) and ATRP method of chemically modified derivatives. Their architectures were confirmed by GPC and 1H NMR spectroscopy. The liquid crystalline behavior of these copolymers was studied by DSC, POM and WXAD. Their liquid-crystalline phase intently depends on the molecular weights of the rigid rod arm of miktoarm star copolymers. The liquid-crystalline phase only appeared after a certain length of PMPCS.

Key words: miktoarm star, atom transfer radical polymerization, mesogen-jacketed liquid crystal polymer, liquid crystalline behavior