A Study of Solution Polymerization of Polyphosphazenes

Abstract

Several alkoxy/aryloxy substituted phosphazene polymers P(OR)2=Nn, where R=CH3, C6H5, C6H5CH3, CH,2CF3, C6H4-C6H5, C6H5-CI, C6H5Br, C8H10 were prepared by the reaction of polydichlorophosphazene with their corresponding sodium salts. The polydichlorophosphazene was obtained by the solution polymerization of hexachlorocyclotriphosphazene in 1,2,4-trichlorobenzene. Sulfamic acid and ammonium sulfamate were used as catalysts Apparently sulfamic acid functions as a catalyst through its acid group in some decomposed form. Toluenesulfonic acid and sulfobenozic acid were new calalysts developed for solution polymerization. The polymerization favors a cationic mechanism. Promoters were found to speed up the polymerization reaction and reduce branching. Effect of different parameters including dilution, catalyst concentration and promoter concentration on the properties of the final polymer were investigated.

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Document Details

Document Type
Technical Report
Publication Date
Sep 16, 1988
Accession Number
ADA199684

Entities

People

  • A. N. Mujumdar
  • J. H. Magill
  • R. L. Merker
  • S. G. Young

Organizations

  • University of Pittsburgh

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Biomedical And Dental Materials
  • Chemical Engineering
  • Chemical Synthesis
  • Chemistry
  • Engineering
  • High Pressure
  • Materials
  • Materials Laboratories
  • Materials Science
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  • Molecular Weight
  • New Jersey
  • Physical Properties
  • Spectra
  • Sulfamic Acids
  • Transition Temperature

Fields of Study

  • Chemistry

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  • Organic Chemistry
  • Polymer Science and Technology