摘要
以6,6′-二羟基麦芽糖六乙酸酯(MA)、4,4′-对羟基联苯酚(MB)、2,5-二羟基苯甲酸(MC)、癸二酰氯(SD)为单体,采用溶液缩聚的方法合成了主链液晶离聚物。通过红外光谱、差示扫描量热及偏光显微等手段,研究了MC含量对液晶离聚物性能的影响。结果表明:液晶聚合物均为热致胆甾型,随MC含量的增加,其玻璃化转变温度、熔点和清亮点呈上升趋势,液晶相逐渐被破坏,羧酸离子的引入没有改变聚合物的液晶相类型。
A series of main-chain liquid-crystalline ionomers （MLCIs） were prepared by solution polycondensation reactions using sebacyl chloride （SD）, 6, 6＇-hydroxy-hexa-O-acetyl-0633, β-maltose （MA）, 4, 4＇- hiphenyldid （ME） and 2, 5-dihydroxybenzoic （MC） as monomers. The mesomorphic properties of MLCIs were investigated by FT-IR, DSC and POM. Results show that MLCIs are thermotropic cholesteric liquid crystal polymers. Glass transition temperature, melting temperature and clearing point temperature increase with the increase of MC content. But the mesophase was destroyed with the increase of MC content. The introduction of ion does not change the type of mesophase.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2009年第2期203-207,共5页
Journal of Functional Polymers
基金
国家高技术发展计划(863计划)(2006AA02Z291)
国家自然科学基金项目(50673105)
关键词
主链液晶离聚物
羧酸
手性
麦芽糖
main-chain liquid-crystalline ionomers
carboxylic acid
chiral
maltose
