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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

✍ Scribed by Seung-Young Koo; Dong-Ho Lee; Heung-Jin Choi; Kil-Yeong Choi

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
556 KB
Volume
61
Category
Article
ISSN
0021-8995

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✦ Synopsis

New aromatic polyetherimides containing the l,l'-bis[4-(3,4-dicarboxyphenoxy)phenyl] -1phenyl-2,2,2-trifluoroethane dianhydride unit were prepared by a conventional two-step method from l,l'-bis[4-(3,4-dicarboxyphenoxy)phenyl]-l-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,) of these polymers were in the range of 207-264°C and the temperatures of 10% weight loss were over 520°C at a heating rate 20"C/min in nitrogen.

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