Accession Number : ADA192275
Title : Laser Flash Photolysis of a Methylene 4,4'-Diphenyldiisocyanate (MDI) Based Polyurethane and Model Carbamates.
Descriptive Note : Technical rept.,
Corporate Author : UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF POLYMER SCIENCE
Personal Author(s) : Hoyle, C E ; No, Y G ; Malone, K G ; Thames, S F ; Creed, David
PDF Url : ADA192275
Report Date : 10 Mar 1988
Pagination or Media Count : 18
Abstract : Transient species in the laser flash photolysis of solutions of methylene 4,4'-diphenyldiisocyanate (MDI) based polyurethanes and small molecule models have been detected. One of the transient species, a substituted anilinyl radical, is not quenched by oxygen while a second transient is extinguished by the introduction of oxygen. Based on the spectral results, a plausible mechanism is offered for the primary photochemical reactions of MDI based polyurethanes.
Descriptors : *CARBAMATES, *POLYURETHANE RESINS, FLASHES, LASERS, MODELS, MOLECULES, OXYGEN, PHOTOCHEMICAL REACTIONS, PHOTOLYSIS, QUENCHING, SPECTRA, TRANSIENTS, PHENYL RADICALS
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE