Accession Number : ADA290685
Title : Preparation and Studies of Urazole Containing Polymers.
Descriptive Note : Final rept. 15 Jan 90-31 Dec 91,
Corporate Author : SOUTHERN ILLINOIS UNIV AT CARBONDALE DEPT OF CHEMISTRY AND BIOCHEMISTRY
Personal Author(s) : Bausch, Mark J.
PDF Url : ADA290685
Report Date : 02 SEP 1994
Pagination or Media Count : 7
Abstract : The fact that the three nitrogen atoms present in urazole and appropriately substituted urazoles have been shown to possess substantial bond-making reactivities has prompted our investigations of (a) the stabilities of nitrogen-entered anions and radicals derived from substituted urazoles; (b)issues related to the syntheses of selected urazole monomers; and (c) the properties of a number of polymers that contain urazoles as monomeric subunits. Published discoveries from this project include (i) determinations of acidity constants for urazole and substituted urazoles in dimethyl sulfoxide as well as aqueous solutions; (ii) evaluations of the N-H homolytic bond strengths in urazole, substituted urazoles, and related heterocycles; and (iii) determinations of the reaction products that result when 1-phenylurazole is subjected to conditions that result in its methylation. Unpublished results from this project include (i) synthesis of various dinitro- and diaminourazoles (useful urazole monomers); (ii) synthesis of polyurazole-ketones; (iii) synthesis of polyurazole epoxies; (iv) synthesis of polyurazole-imides; and (v) characterization of the aforementioned polymers. The newly-synthesized polyurazoles were shown to be insoluble in chlorinated organic solvents but were found to be sparingly soluble in DMSO. The polyurazole- ketones and polyurazole epoxies had Tg's of about 260 deg C. (jg)
Descriptors : *POLYMERS, *NITROGEN, SOLUTIONS(MIXTURES), SYNTHESIS, WATER, REACTIVITIES, ATOMS, CHEMICAL BONDS, MONOMERS, EPOXY COMPOUNDS, ORGANIC SOLVENTS, CHLORINATION, ANIONS, REACTANTS(CHEMISTRY), CHLORINE, IMIDES, KETONES, CHEMICAL RADICALS, METHYL SULFOXIDE, METHYLATION.
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE