采用2,2＇-双(三氟甲基)-4,4＇-二氨基联苯醚(6FODA)和4,4＇-二氨基二苯醚(ODA)作为二胺单体,六氟二酐(6FDA)作为酸酐单体,通过在单体中设计引入氟基团、柔性醚键构建非平面共轭的芳香结构,同时调控缩聚反应中单体的摩尔比例,减少电荷转移络合物(CTC)效应,制备了一系列含氟无色透明聚酰亚胺薄膜。结果表明:该薄膜具有优异的光学透明性和热稳定性优异,透过率超过80%;当失重5%时,热失重温度为500℃;当温度达到800℃时,薄膜的碳残余均高于50%。这些薄膜不仅耐高温,而且实现了无色透明的特性。
Using 2,2＇-bis(trifluoromethyl)-4,4＇-bis(aminophenoxy)ether (6FODA) and 4,4＇-bis(aminophenoxy)diphenyl ether (ODA) as diamine monomers and hexafluorodisiloxane (6FDA) as anhydride monomer,a non-planar aromatic structure with flexible ether bonds was constructed by introducing fluorine groups and controlling the molar ratio of the monomers in the polymerization reaction to reduce the charge transfer complex (CTC) effect,leading to the successful synthesis of a series of fluorine-containing transparent polyimide films.The results showed that the films exhibited excellent optical transparency and thermal stability,with a transmittance of over 80%.When the weight loss was 5%,the thermal wieght loss temprature was 500℃.The residue was 50% when the temperature reached 800℃.These films not only demonstrated outstanding temperature resistance,but also achieved the characteristics of being colorless and transparent.
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基金资助
国家自然科学青年基金项目(52103225);辽宁省教育厅面上项目(LJKZ0163);辽宁省科技厅联合基金面上项目(2023-MSLH-254)
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