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

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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 10, 1988
Accession Number
ADA192275

Entities

People

  • C. E. Hoyle
  • David Creed
  • K. G. Malone
  • S. F. Thames
  • Y. G. No

Organizations

  • University of Southern Mississippi

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Chemistry
  • Classification
  • Hydrogen
  • Identification
  • Instrumentation
  • Macromolecules
  • Military Research
  • Mississippi
  • Molecules
  • Photochemical Reactions
  • Polymers
  • Small Molecules
  • Spectra
  • United States
  • Universities

Fields of Study

  • Chemistry

Readers

  • Combustion science or combustion engineering.
  • Molecular Photonics/Laser Physics
  • Organic Chemistry

Technology Areas

  • Directed Energy