摘要
合成了３种含偶氮苯侧基的聚酯并研究了其二阶非线性光学（ＮＬＯ）的特性。这类聚酯具有较好的成膜性能，聚合物的极性、链结构、生色团含量以及生色团不同聚集状态明显影响膜的吸收光谱和极化膜的二次谐波产生，其中以４′－（Ｎ，Ｎ′二羟乙基）－胺基－４－硝基偶氮苯与丁二酸酐合成的聚酯具有较强的ＮＬＯ效应，且在玻璃化温度以上极化膜的二次谐波衰减较慢，以４′－（Ｎ，Ｎ′二羟乙基）胺基－４－硝基偶氮苯与己二酰氯合成的聚酯因具液晶性在较低电压下可以极化。
Three kinds of novel polyesters with the donors of azobenzenes covanlently linked their mainchains have been obtained through condensation of 4′ (N,N′ dihydroxyethyl) amino 4 nitroazobenzene or 3′ chlorine 4′ (N,N′ dihydroxyethyl) amino 4 nitroazobenzene with appropriate anhydrides. The film of poly(4′ bis(N,N′ oxyethylene) imino 4 nitroazobenzene adipyl) can be poled under low voltage, due to its liquid crystal nature. The poled film of poly(4′ bis(N,N′ oxyethylene) imino 4 nitroazobenzene succinyl) possesses the highest intensity and the slowest decay of second harmonic generation among the films of polyesters synthesized in this work. These results are related to the polarity, the mainchain structure and the chromophore content of polyesters, as well as the aggregation and the Maier Saupe type thermotropic interaction of the chromophores in polyesters.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第4期104-108,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金
广东省自然科学基金
高等学校博士学科点专项科研基金
关键词
偶氮苯染料
聚酯
液晶
非线性光学
染料
azobenzene derivatives, liquid crystalline polymer, second order nonlinear optics, polyester
