双酚F型聚酰亚胺薄膜的制备与性能

Preparation and Performance of Bisphenol F-Type Polyimide Films

以4-氯代酞酰亚胺和双酚F为原料,在N,N'-二甲基乙酰胺溶剂中,经水解、酸化、脱水,合成了一种新型的双酚F型二酐(BPFDA)单体,并用1 H NMR和IR测试方法确认了其结构。采用传统的一步法,用N,N'-二甲基乙酰胺作溶剂,BPFDA分别与4,4'-二氨基二苯醚(ODA)和4,4'-二氨基二苯甲烷(MDA)聚合,得到聚酰胺酸,并进一步热亚胺化得到聚酰亚胺薄膜,并对其进行了表征。结果表明,BPFDA/ODA薄膜和BPFDA/MDA薄膜的玻璃化转变温度分别为200和204℃;热失重分析表明,质量损失5%的温度分别为506.50和459.10℃;其拉伸强度分别为110和100 MPa。

A novel bisphenol F-type dianhydride（BPFDA） monomer was synthesized using 4-chlorophthalimide through hydration,acidification,and dehydration.Its structure was determined with 1H NMR and IR.Two types of polyimide films were prepared with the dianhydride and 4,4′-diaminodiphenyl ether（ODA） or 4,4′-methylene dianiline（MDA） via conventional one-step method in N,N′-dimethylacetamide.The obtained polyamic acid was then further imidized into polyimide films and characterized.Results show that the glass-transition temperatures of the polyimide films were 200 and 204 ℃;the temperatures of 5% mass loss were 506.50 and 459.10 ℃;and the tensile strength of the films were 110 and 100 MPa,respectively.