Synthesis and Characterization of Thianthrene Containing Poly(benzoxazole)s
Document Type
Article
Publication Date
8-1-1995
Department
Polymers and High Performance Materials
Abstract
New thioether- and thianthrene-containing poly(benzoxazole)s (PBOs) were synthesized from 4,4'-thiobis[3-chlorobenzoic acid] and thianthrene-2,7- and -2,8-dicarbonyl chlorides with commercially available bis-o-aminophenols. Polymers were prepared via solution polycondensation in poly(phosphoric acid) at 90-200 degrees C. Transparent PBO films were cast directly from polymerization mixtures or m-cresol. The films were flexible and tough. Nonfluorinated PBOs were soluble only in strong acids and AlCl3/NO(2)R systems by forming complexes with the benzoxazole heterocycle. Glass transition temperatures ranged from 298-450 degrees C, and thermogravimetric analysis showed good thermal stabilities in both air and nitrogen atmospheres. (C) 1995 John Wiley and Sons, Inc.
Publication Title
Journal of Polymer Science Part A: Polymer Chemistry
Volume
33
Issue
11
First Page
1901
Last Page
1906
Recommended Citation
Johnson, R. A.,
Mathias, L. J.
(1995). Synthesis and Characterization of Thianthrene Containing Poly(benzoxazole)s. Journal of Polymer Science Part A: Polymer Chemistry, 33(11), 1901-1906.
Available at: https://aquila.usm.edu/fac_pubs/5887