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