Laser Flash Photolysis of a Methylene 4, 4'-Diphenyldiisocyanate (MDI) Based Polyurethane and Model Carbamates

Document Type

Article

Publication Date

3-10-1988

Department

Chemistry and Biochemistry

School

Mathematics and Natural Sciences

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.

Publication Title

Defense Technical Information Center

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