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采用熔融聚合法反应得到3种新型侧链含偶氮苯结构的线型聚酯(P1-P3),通过IR、UV-vis、1H NMR、SEC、TG-DTA和荧光等对聚酯的结构和性能进行了表征。聚酯(P1-P3)在氯仿、四氢呋喃等常用有机溶剂中有良好的溶解性,Mw分别为31 890、20 165、29 655 g/mol,5%失重温度分别为332、322、312℃。在365 nm紫外光照射下,聚酯(P1-P3)中的偶氮苯结构发生了反-顺异构化。聚酯(P1-P3)发紫色荧光。
Three kinds of novel linear polyesters (P1-P3) with azobenzene structure were obtained by melt polymerization. The structure of the polyester was characterized by IR, UV-vis, 1H NMR, SEC, TG-DTA and fluorescence And performance were characterized. Polyester (P1-P3) has good solubility in common organic solvents such as chloroform and tetrahydrofuran. Mw is 31 890, 20 165 and 29 655 g / mol, respectively. The 5% weight loss temperature is 332, 322 and 312 ℃ respectively. Under 365 nm UV irradiation, the azobenzene structure in polyester (P1-P3) undergoes trans-cis isomerization. Polyester (P1-P3) fluoresces purple.