含氟偶氮苯光响应性聚合物的合成及性能

以1,2,3,4,5-五氟苯胺为原料, FeSO-4?7H2O负载的KMnO4为氧化剂, 制得全氟代偶氮苯, 在KOH作用下醇解, 进行丙烯酰化反应, 得到光响应性的功能单体4-甲基丙烯酰氧基九氟偶氮苯, 用GC-MS, 元素分析及NMR等方法对功能单体进行表征, 并研究了其光异构化性能. 以4-甲基丙烯酰氧基九氟偶氮苯(MANFAB)为功能单体, 与十字交联剂三羟甲基丙烷三甲基丙烯酸酯(TRIM)在自由基引发下合成了光响应性的三维交联聚合物, 并研究了其光响应性质.

Synthesis and Properties of Photoresponsive Polymer Materials Containing Fluoro-Azobenzene

Decafluoroazobenzene was synthesized with satisfied yield via 1,2,3,4,5-pentafluoroaniline as the starting material and FeSO4?7H2O supported KMnO4 as the oxidant. Decafluoroazobenzene was hydrolyzed in t-BuOH in the presence of KOH, and then methacrylated with methacrylic chloride. Finally, a photoresponsive functional monomer, (4-methacryloyloxy)nonafluoroazobenzene(MANFAB), was obtained. The structure of MANFAB was confirmed by GC-MS, elemental analysis, and NMR. The photoresponsive properties of MANFAB were studied by UV-Vis. Photoresponsive cross-linked polymer containing fluoro-azobenzene were prepared by radical polymerization with trimethylolpropanetrimethylacrylate as the cross-linker, (4-methacryloyloxy)nonafluoroazobenzene as the functional monomer, and AIBN as the initiator. After polymerization, the photoisomerizations of fluoro-azobenzene chromophore were retained. And the photoresponsive properties of the polymer materials were also studied by UV-Vis spectra.