化学学报 ›› 1988, Vol. 46 ›› Issue (4): 367-371. 上一篇    下一篇

研究论文

乙基氰乙基纤维素溶致性液晶的研究

黄勇;陈鸣才;李历生   

  1. 中国科学院广州化学研究所
  • 发布日期:1988-04-15

Study on lyotropic liquid crystal of ethyl-cyanoethyl cellulose

HUANG YONG;CHEN MINGCAI;LI LISHENG   

  • Published:1988-04-15

纤维素和纤维素衍生物在适当的溶剂中可以形成溶致性液晶, 乙基氰乙基纤维素是纤维素的一种混合醚类衍生物, 本文研究了其溶致性液晶的形成, 结构以及不同溶剂对形成液晶所产生的影响.

关键词: 晶体结构, 液晶, 高聚物, 临界质量, 流变性质, 小角散射, 纤维素醚, 氰乙基, 光散射, 乙基纤维素

Ethyl cyanoethyl cellulose (I) was soluble in many organic solvents and formed liquid- solns. above the crit. concentration With increasing concentration, the solution was transformed from isotropic to anisotropic state through a biphasic state. Phase separation was observed in I-dichloroacetic acid and I-trifluoroacetic acid biphasic solns. The liquid crystals could develop into a spherulitic structure. For organic acidic solvent systems, the crit. concentration decreased with increasing acidity. The crit. concentration decreased with decreasing polymer-solvent interaction parameter for most organic solvents.

Key words: CRYSTAL STRUCTURE, LIQUID CRYSTAL, HIGHPOLYMER, CRITICAL MASS, RHEOLOGICAL PROPERTY, SMALL ANGLE SCATTERING, CELLULOSE ETHERS, ETHYL CYANIDE, LIGHT SCATTERING, ETHYLCELLULOSE

中图分类号: