High-Molecular Compounds (Selected Articles).

Abstract

With radical polymerization in homogenous liquid phase at early stages of transformation lifetime of active centers is usually 1-5 s. We discovered, that during the polymerization of methylmethacrylate (MMA) in the presence of orthophosphoric acid at usual temperatures appear the long-lived radicals, which lead process actually by the mechanism of living chains , moreover system remains quasi-homogeneous. During investigation of photo-initiated polymerization in systems MMA - H3PO4 composition of 1:0.3 and 1:6 at 25 are discovered, that after disconnection of source of UV light reaction does not extinguish, but is continued with constant, somewhat less than light, speed up to virtually complete exhaustion of monomer during 10-20 hours (polymerization without preliminary illumination by UV light does not occur).

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Document Details

Document Type
Technical Report
Publication Date
Sep 04, 1987
Accession Number
ADA185357

Entities

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acids
  • Alkenes
  • Biomedical And Dental Materials
  • Chemical Reaction Properties
  • Chemical Synthesis
  • Chemistry
  • Copolymers
  • Electrical Resistance
  • Experimental Data
  • High Temperature
  • Molecular Weight
  • Natural Rubber
  • Organic Chemistry
  • Polymer Chemistry
  • Polymeric Films
  • Polymers
  • Polymethyl Methacrylate

Readers

  • Analytical Chemistry
  • Optical Physics and Photonics.
  • Polymer Science and Technology