树枝状偶氮液晶高分子(PAMAM-MMAZO)的合成及表征  

Synthesis and Characterization of Dendritic Azobenzene Side-Chain Liquid Crystalline Copolymer (PAMAM-MMAZO)

作　　者：陈建芳[1] 张海良[2] 王霞瑜[2] 

机构地区：[1]湖南工程学院化工系,湘潭411104 [2]湘潭大学化学学院高分子材料研究所

出　　处：《应用化学》2006年第8期835-839,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20374042);湖南省自然科学基金(04JJ3044)资助项目

摘　　要：采用扩散法合成了1-2代树枝状聚酰胺-胺（PAMAM）。采用Michael加成方法对树枝状PAMAM进行表面修饰，将6-（4′-甲氧基4-氧基偶氮苯）-甲基丙烯酸已酯偶氮液晶基元（MMAZO）引入树枝状PAMAM的末端，在常温常压下合成了树枝状偶氮液晶高分子PAMAM-MMAZO。用液相色谱分析产品的纯度，用红外光谱（IR）和核磁共振谱（1^H NMR）对合成产物结构进行了表征。以差热分析（DSC）和偏光显微镜（POM）研究了其液晶性。结果表明，采用此法可成功合成树枝状高分子液晶PAMAM-MMAZO，纯化后其纯度可达90％以上，产率可达45％以上。液晶性研究显示，PAMAM-MMAZO呈现出典型的向列型液晶织构。Polyamidoamine dendrimers （PAMAM） of 1 - 2 generations（ 1.0G - 2.0G PAMAM） were synthesized v/a the divergent procedure, we synthesized and the dendritic PAMAM-MMAZO liquid crystal polymer was synthesized by Michael addition at room temperature under normal pressure. LC, IR, and 1^H NMR revealed that the target polymers were succesfully prepared. The liquid-crystalline behavior of the synthesized copolymers was evidenced from POM and DSC observation. The yield of the products was 45% with a purity over 90%. The copolymers exhibit different liquid crystalline behavior compared to MMAZO.

关 键 词：树枝状聚酰胺-胺 树枝状偶氮液晶 表面修饰 液晶性 

分 类 号：O631.9[理学—高分子化学]