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以含氟的二胺5,5′-(六氟异丙基)-二-(2-氨基苯酚)(6FHP)及二酐3,3′,4,4′-联苯四甲酸二酐(BPDA)为单体.首先合成了经酰胺化的主链上带有活性羟基的含氟聚酰亚胺,再通过 Mitsunobu 反应将分散红1(DR1)共价链接到聚酰亚胺的侧链骨架上,合成了含偶氮苯侧链型聚酰亚胺.利用 IR、UV-Vis、DSC-TG 等手段对聚合物进行了结构和热性能表征,示差扫描量热分析(DSC)测得其玻璃化转变温度为298℃,热重分析(TGA)测得其热分解温度为398℃.研究了聚合物的 N-甲基-2-吡咯烷酮(NMP)溶液和聚合物薄膜在紫外光诱导下的光异构化及热回复异构化行为,结果表明,它们在一定波长紫外光诱导下均能发生光致变色现象.
The fluorinated diamine 5,5 ’- (hexafluoroisopropyl) -bis- (2-aminophenol) (6FHP) and dianhydride 3,3’, 4,4’- biphenyl tetracarboxylic dianhydride BPDA) as a monomer.Firstly, the amidated fluorinated polyimide with active hydroxyl groups on the main chain was synthesized, and the reddish 1 (DR1) was covalently linked to the side chain of the polyimide through the Mitsunobu reaction The structure and thermal properties of the polymers were characterized by means of IR, UV-Vis and DSC-TG. DSC (differential scanning calorimetry) The glass transition temperature was 298 ℃, and the thermal decomposition temperature was 398 ℃ by TGA.It was found that the N-methyl-2-pyrrolidone (NMP) Under the light isomerization and thermal recovery isomerization behavior, the results show that they are under a certain wavelength UV light can occur photochromism.