摘要
以4,4′-(六氟异丙烯)二酞酸酐(6FDA)为二酐单体,2,2-双(3-胺基-4-羟基苯)六氟丙烷为二胺单体,采用"溶液缩聚-亚胺化反应"两步合成法,获得了可溶性聚酰亚胺材料。通过傅里叶变换红外光谱(FT-IR)、凝胶色谱(GPC)、热重分析(TGA)、X射线衍射(XRD)等分析测试,考察了原料配比、亚胺化温度、亚胺化时间及催化剂等因素对产物重均分子量等特性参量的影响。结果表明:通过调节合成条件,该聚酰亚胺重均分子量可达4.5×104,具有优良的热稳定性,其起始分解温度高于490°C,且在NMP、DMF、DMAc、DMSO、THF、丙酮等有机溶剂中具有优良的溶解性能,能于80°C的低温下亚胺化制得,对材料的大批量制备具有重要意义。
4,4′-（Hexafluoroisopropylidene）diphthalic anhydride （6FDA） was polymerized with 2, 2 bis （3-amino-4-hydroxyphenyl） hexafluoropropane （BAPAF）. Fluorinated polyimide was obtained via a two- step polycondensaion procedure. The effect of reaction factors like raw materials＇ ratio, imidization tem- perature, imidization time and catalyst on the molecular weight were studied. Polyimide was characterized by FT-IR, GPC, XRD and solubility test. Results showed that polyimide of 6FDA-BAPAF obtained under imidization temperature （80 ℃） had high molecular weight reaching 4.5 ×10^4 , which displayed excellent thermal properties with Td higher than 490 ℃ and had excellent solubility in polar aprotic organic solvents such as NMP, DMF, DMAc, DMSO, THF and acetone.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2012年第2期152-158,共7页
Journal of Functional Polymers
基金
国家自然科学基金资助项目(50703023)
上海市重大基础研究项目(08dj1400400)
