Accession Number : AD0722246

Title :   Polyquinazolotriazoles,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Hergenrother,P. M.

Report Date : MAR 1971

Pagination or Media Count : 29

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)

Descriptors :   (*HEAT RESISTANT PLASTICS, SYNTHESIS(CHEMISTRY)), NITROGEN HETEROCYCLIC COMPOUNDS, THERMOGRAVIMETRIC ANALYSIS, TRANSITION TEMPERATURE, CALORIMETRY, TRIAZINES, INFRARED SPECTRA

Subject Categories : Organic Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE