Accession Number : ADA332820

Title :   Propagating Polymerization Fronts

Descriptive Note : Final rept. 30 Sep 94-29 Sep 97

Corporate Author : UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF CHEMISTRY

Personal Author(s) : Pojman, John J.

PDF Url : ADA332820

Report Date : 18 NOV 1997

Pagination or Media Count : 12

Abstract : We have determined the factors that affect front velocity, conversion and molecular in frontal polymerization with liquid monomers and made some progress with solid monomer systems. We developed the first binary system, consisting of acrylate polymerization via a free-radical mechanism and the curing of an epoxy resin. A full IPN is produced. We also prepared the first frontal polymer dispersed liquid crystal (PDLC) material. We developed a method to suppress convective instabilities via tube rotation and have determined the critical conditions affecting ascending front stability with respect to natural convection. We have studied the frontal curing of DEGEBA epoxy resin. We developed new method to prepare functionally gradient materials.

Descriptors :   *POLYMERIZATION, *EPOXY RESINS, MOLECULAR WEIGHT, MORPHOLOGY, COPOLYMERS, MONOMERS, FREE RADICALS, CURING, ACRYLATES.

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE