Preparation and Characterization of Organosoluble Polyimides Based on 1,1-Bis4-(3,4-aminophenoxy)phenylcyclohexane and Commercial Aromatic Dianhydrides

摘要

A bis(ether amine )III-A containing a cyclohexane cardo group,1,1-bis4-(4-aminophenoxy)phenylcyclohexane,was synthesized and used as a monomer to prepare polyimides VI-A with six commercial dianhydrides via three different proce-dures.The intermediate poly(amic acid)s had inherent viscosities of 0.83-1.69 dL g~(-1) and were thermally or chemically conerted into polyimides.Polyimides were also prepared by high-temperature direct polymerization in m-cresol and had inherent viscosities higher than the thermally or chemically cyclodehydrated ones.To improve the solubility of polyimides,six copolyimides were also synthesized from bis(ether amine)III-A with a pair of dianhydrides,which contained 3,3',4,4'-diphenylsulfonetet-racarboxylic dianhydride or 4,4'-hexafluoroisopropylidenediphthalic anhydride.Series VI-A polyimides were characterized by the good physical properties of their film-forming ability,thermal stability,and tensile properties.A comparative study of the properties,with the corresponding polyimides derived from 2,2-bis4-(4-aminophenoxy)-phenylpropane,is also presented.