Title

THIANTHRENE-CONTAINING POLYIMIDES WITH MONOMER FORMATION VIA NUCLEOPHILIC AROMATIC-SUBSTITUTION

Document Type

Article

Publication Date

8-1-1995

Department

Polymers and High Performance Materials

Abstract

Thianthrene-2,3,7,8-tetracarboxylic dianhydride was synthesized via nucleophilic aromatic substitution of N-phenyl-4,5-dichlorophthalimide with thiobenzamide, thioacetamide, and sodium sulfide. This monomer was then polymerized with aromatic diamines by the conventional low temperature technique in N,N-dimethylacetamide (DMAc) to yield soluble poly(amic acid)s. Polyimides were obtained by thermal cyclization of the poly(amic acid) films. Polymers obtained formed creasable thin films and had excellent thermal stability in air and nitrogen. The bent thianthrene structure limited crystallization and chain packing, as indicated by x-ray analysis. The amorphous thianthrene-containing polyimides were only soluble in H2SO4. (C) 1995 John Wiley and Sons, Inc.

Publication Title

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

Volume

33

Issue

11

First Page

1891

Last Page

1899

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