3,3′-二甲基-4,4′-二氨基二环己基甲烷型聚酰亚胺薄膜的制备与性能表征

Preparation and Properties of Polyimide Film with3,3′-Dimethyl-4,4′-diamino Dicyclohexyl Methane

将3,3′-二甲基-4,4′-二氨基二环己基甲烷(DMDC)、4,4′-二氨基二苯醚(ODA)与3,3′,4,4′-四羧基二苯醚二酐(ODPA)进行反应得到聚酰胺酸溶液,通过改变二胺单体的配比,采用热亚胺化法制备了系列聚酰亚胺薄膜,在保证聚酰亚胺薄膜常规的优势性能前提下,改善聚酰亚胺的颜色、可加工性能和溶解性,并对其进行表征与性能分析。结果表明:该聚酰亚胺薄膜的光学性能、力学性能良好;脂肪族柔性单体DMDC的引入降低了聚酰亚胺的玻璃化转变温度Tg,提高了薄膜在DMAc、DMF、NMP、CHCl_3溶剂中的溶解性,扩大了聚酰亚胺在光电领域的应用范围。

A polyamide acid solution was synthesized from 3,3′-dimethyl-4,4′-diamino dicyclohexyl methane （DMDC）, 4,4′-diaminodiphenyl ether （ODA）, and 3,3′,4,4′-tetracarboxylicdiphenyl ether dianhydride （ODPA）. Then a series of polyimide （PI） films were prepared using thermal imidization method by changing the proportion of diamine monomers to improve their color, processability, solubility and keep their conventional excellent properties, and the films were characterized and analyzed. The results show that the PI films have excellent optical and mechanical properties. The introduction of DMDC decreases the glass transition temperature of PI and increases the solubility of PI in DMAc, DMF, NMP, and CHCl3, which enlarges the application range of PI in photoelectricity field.