东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (5): 757-760.DOI: -

• 论著 • 上一篇    

新型甲基丙烯酸酯类手性液晶单体及其聚合物的表征

胡建设;李乌云塔娜;张文昌;张莹;   

  1. 东北大学理学院;内蒙古医学院公共卫生学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然学科基金资助项目(50503005);;

Preparation and characterization of new chiral liquid crystalline methacrylate monomers and polymers

Hu, Jian-She (1); Li, Wuyun-Tana (1); Zhang, Wen-Chang (1); Zhang, Ying (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110819, China; (2) Public Health College, Inner Mongolia Medical College, Huhehaote 010059, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Hu, J.-S.
  • About author:-
  • Supported by:
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摘要： 制备了含薄荷基的三种甲基丙烯酯类单体(M1~M3)及聚合物(P1~P3),其化学结构通过了FT-IR和1H-NMR的表征;采用DSC,POM,XRD等研究了这些单体及聚合物的液晶性能,并利用紫外/可见/近红外光谱仪测试了手性单体的选择反射性质.研究表明:M1与P1均无液晶性,而M2与M3在升降温过程中都出现了液晶性和选择反射现象,其中M2呈现手性近晶相C相及胆甾相,M3仅呈现胆甾相;此外,随着液晶核刚性的增加或柔性间隔基长度的缩短,对应单体的熔点和清亮点均升高.除了P1,P2与P3均为互变热致液晶聚合物,呈现胆甾相的彩色织构,且其液晶相温度范围远大于对应单体的液晶相范围.

关键词: 甲基丙烯酸酯, 手性, 液晶, 单体, 聚合物

Abstract: New chiral methacryalte monomers (M1~M3) and the corresponding polymers (P1~P3) based on menthol were prepared. Their chemical structures were characterized by FT-IR, or 1H-NMR, and the mesomorphism was investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). The selective reflection property was studied with UV/visible/NIR spectroscopy. The experimental results show that no mesomorphism appeared in the M1 and P1 while the mesomorphism and the selective reflection revealed in the M2 and M3, with a chiral smectic C (SC*) phase and cholesteric phase exhibited in M2 and a single cholesteric phase in M3. The melting and clearing temperatures of M1~M3 raised with the increasing of the mesogenic core rigidity and the shortening of the flexible spacer length. Except for P1, P2 and P3 showed enantiotropic thermotropic mesomorphism and color texture of cholesteric phase. Moreover, the mesophase temperature ranges of the polymers were greater than those of the corresponding monomers.

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