PREPARATION AND PROPERTIES OF NOVEL SOLUBLE AROMATIC POLYETHERIMIDES FROM 1,1'-BIS[4-(3,4-DICARBOXYPHENOXY)PHENYL]-1-PHENYL-2,2,2-TRIFLUOROETHANE DIANHYDRIDE AND AROMATIC DIAMINES

摘要

New aromatic polyetherimides containing the 1,1'-bis[4-(3,4-dicarboxyphenoxy)phenyl]-1-phenyl-2,2,2-trifluoroethane dianhydride unit were prepared by a conventional two-step method from 1,1'-bis[4-(3,4-dicarboxyphenoxy)phenyl]-1-phenyl-2,2,2-trifluoroethane dianhydride and several diamines. This procedure yielded high molecular weight polyetherimides with inherent viscosities of 0.22-1.29 dL/g. Most of the corresponding polyetherimides were soluble in organic solvents such as N-methyl-2-pyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, and methylene chloride under ambient temperature. The glass transition temperatures (T-g) of these polymers were in the range of 207-264 degrees C and the temperatures of 10% weight loss were over 520 degrees C at a heating rate 20 degrees C/min in nitrogen. (C) 1996 John Wiley & Sons, Inc. [References: 11]