Title

Vapor phase deposition of polybenzoxazoles

Document Type

Article

Publication Date

6-1-1998

Department

Polymers and High Performance Materials

Abstract

Vapor phase deposition was carried out on multifunctional aliphatic and aromatic benzoxazoles to yield powdered samples of poly(dimethylenebenzoxazoles). Representative aliphatic and aromatic poly( dimethylenebenzoxazoles) were also synthesized through solution methods using 4-amino-3-hydroxyhydrocinnamic acid and 2-(4-(bromomethyl)phenyl)-6-(bromomethyl)benzoxazole, respectively, as monomers. Both aromatic and aliphatic polybenzoxazoles containing -CH2CH2- units in the polymer backbone displayed catastrophic weight loss over a very narrow temperature range. This is in contrast with other polybenzoxazoles which show a gradual weight loss over 500-1000 degrees C. Vapor phase deposition carried out under vacuum on the polymers gave similar polymers in the collection zone suggesting the catastrophic weight loss is attributed to thermal depolymerization of the polymer through a diradical intermediate similar to the thermolysis and polymerization of [2.2] paracyclophane. (C) 1998 John Wiley & Sons, Inc.

Publication Title

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

Volume

36

Issue

8

First Page

1317

Last Page

1328