Polyquinazolotriazoles,
Abstract
A novel high molecular weight (eta(inh) = 1.4 dl/g) polyquinazolotriazole (PQT) was prepared from the reaction of 3,3'-(2'',6''-pyridinediyl)bis(5-(o-aminophenyl)-1,2,4-triazole) with isophthalic acid by solution cyclopolycondensation in polyphosphoric acid, with diphenyl isophthalate by melt polycondensation, and with isophthaloyl chloride to form a precursor polyamide which subsequently underway cyclodehydration. Thermal characterization of the PQT by TGA showed initial weight loss in air commencing at about 490C. The PQT exhibited a weight loss of only 4% after aging in static air for 200 hr at 316C and a Tg of 342C as measured by DSC. Prior to polymer synthesis, a series of model compounds were prepared and characterized. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0722246
Entities
People
- P. M. Hergenrother
Organizations
- Boeing