以4,4'-二氨基-2,2'-双三氟甲基联苯(TFDB)和4,4'-联苯醚二酐(ODPA)为单体,采用不同亚胺化方式制备三种无色透明的聚酰亚胺(PI)薄膜,并对其性能进行了性能表征。结果表明,通过化学亚胺化得到的无色透明PI薄膜各方面的性能都优于热亚胺化得到薄膜;其中化学亚胺化后在依次经过析出、烘干、溶解、流延得到的PI-03薄膜性能更优,玻璃化温度为273.96℃,热失重温度为590.88℃,热膨胀系数达到24.99×10-6/K,黄色指数为1.8,且具有更好的溶解性。
Using 4,4'-diamino-2,2'-bistrifluoromethylbiphenyl (TFDB) and 4,4'-biphenyl ether dianhydride (ODPA) as monomer,the polymerization through different imidization methods to prepare three colorless transparent PI film,and characterized the products.The results shown that the performance of the colorless transparent PI film obtained by chemical imidization was superior to that obtained by thermal imidization in all aspects.PI-03 film had better performance,such as glass transition temperature was 273.96℃,thermal weight loss was 590.88℃(5%),thermal expansion coefficient reached 24.99ppm/K,yellow index was 1.8,and it had better solubility.
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