Organophosphazenes.22 Copolymerization of (Alpha-Methylethenylphenyl) Penta-fluorocyclotriphosphazenes with Styrene and Methyl Methacrylate.

Abstract

Both 3- and 4- (1-Methylethenylphenyl) pentafluorocyclotriphosphazene (N3P3F5C6H4C(CH3)=DH2) undergo radical copolymerization with styrene and methyl methacrylate. Flame retardant copolymers with up to 66% and 44% phosphazene content were obtained for the styrene and methyl methacrylate systems respectively. Reactivity ratios and Alfrey-Prince parameter for the styrene system show that the major perturbation produced by the phosphazene is a polar sigma electron withdrawing effect. The methyl methacrylate system was found to exhibit significant penultimate effects in its reactivity behavior. The copolymers were characterized using elemental analysis, gel permeation chromatophrphy, membrane osmometry, TGA and DSC. Keywords: Cyclophosphazenes; Reactivity ratios; Phosphazenes; Vinylcopolymers; pennultimate effects.

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Document Details

Document Type
Technical Report
Publication Date
Mar 15, 1988
Accession Number
ADA192268

Entities

People

  • C. W. Allen
  • D. E. Brown End
  • J. C. Shaw

Organizations

  • University of Vermont

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Copolymers
  • Electrons
  • Engineering
  • Flame Retardants
  • Macromolecules
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Organic Materials
  • Phosphazene
  • Polymer Degradation
  • Polymers

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  • Organic Chemistry
  • Surface Coatings Technology.
  • Underwater engineering and Marine Technology.

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  • Microelectronics