摘要
2-氯-5-硝基三氟甲苯与2,7-二羟基萘经亲核取代反应得到2,7-双(4-硝基-2-三氟甲基苯氧基)萘(I),然后在Pd/C和水合肼作用下发生还原反应得到2,7-双(4-氨基-2-三氟甲基苯氧基)萘(II)。该二胺单体分别与均苯四甲酸二酐(PMDA)、3,3’,4,4’-联苯四酸二酐(BPDA)、3,3’,4,4’-二苯醚四酸二酐(ODPA)和3,3’,4,4’-二苯甲酮四酸二酐(BTDA)进行低温缩聚反应得到聚酰胺酸,经热酰亚胺化制备出4种萘基取代含氟聚酰亚胺(PI)薄膜。结果表明:PI薄膜均具有良好的光学透明性和溶解性,其中ODPA基PI薄膜的光学透明性最好,450 nm处的透光率达到60%,且可溶于四氢呋喃等弱极性溶剂。
2,7-bis（4-nitro-2-trifluoromethylphenoxy）naphthalene（I） was synthesized through nucleophilic substitution reaction of 2-chloro-5-nitro benzotrifluoride and 2,7-dihydroxynaphthalene,then a diamine monomer,2,7-bis（4-amino-2-trifluoromethylphenoxy）naphthalene（II） was synthesized through the catalytic reduction with hydrazine and Pd/C.Four kinds of polyamide acids were synthesizedfrom the diamine monomer II reacting with pyromellitic dianhydride（PMDA）,3,3＇,4,4＇-biphenyltetracarboxylic dianhydride（BPDA）,3,3＇,4,4＇-oxydiphthalic anhydride（ODPA） and 3,3＇,4,4＇-benzophenone tetracarboxylic dianhydride（BTDA） respectively.Then four kinds of naphthyl substituted fluorinated polymide films were prepared via thermal imidization of polyamic acid.The experimental results show that these PI films exhibit excellent optical transparency and solubility.The PI prepared from ODPA shows best optical transparency with the transmittance higher than 60% at 450 nm and excellent solubility even in less polar solvent,such as THF.
出处
《绝缘材料》
CAS
北大核心
2011年第4期4-8,共5页
Insulating Materials
基金
辽宁省博士启动基金资助项目(20071102)
