Thermolysis of Poly [bis(trifluoroethoxy)phosphazene]

Harry R. Allcock, W. J. Cook

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Poly[bis(trifluoroethoxy)phosphazene], [NP(OCH2CF3)2]n, depolymerizes at temperatures above 150° to yield the cyclic trimer, tetramer, pentamer, higher oligomers, and medium molecular weight polymers. The reactions were studied by the use of gel permeation chromatography, mass spectrometry, and solution viscosity. At temperatures near 400°, depolymerization of some polymer samples was accompanied by the elimination of small amounts of gaseous ClCH2CF3. This constitutes a diagnostic test for the presence of residual P-Cl bonds in the polymer. The depolymerization was also studied in the presence of acidic and basic reagents and in solution: acids accelerate the depolymerization. The reaction mechanisms are discussed. The thermal behavior of [NP(OCH2CF2CF2H)2]n is also described.

Original languageEnglish (US)
Pages (from-to)284-290
Number of pages7
JournalMacromolecules
Volume7
Issue number3
DOIs
StatePublished - May 1 1974

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Thermolysis
Depolymerization
Polymers
Gel permeation chromatography
Oligomers
Mass spectrometry
Molecular weight
Viscosity
Temperature
Acids
poly(bis(trifluoroethoxy)phosphazene)

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Allcock, Harry R. ; Cook, W. J. / Thermolysis of Poly [bis(trifluoroethoxy)phosphazene]. In: Macromolecules. 1974 ; Vol. 7, No. 3. pp. 284-290.
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Thermolysis of Poly [bis(trifluoroethoxy)phosphazene]. / Allcock, Harry R.; Cook, W. J.

In: Macromolecules, Vol. 7, No. 3, 01.05.1974, p. 284-290.

Research output: Contribution to journalArticle

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AB - Poly[bis(trifluoroethoxy)phosphazene], [NP(OCH2CF3)2]n, depolymerizes at temperatures above 150° to yield the cyclic trimer, tetramer, pentamer, higher oligomers, and medium molecular weight polymers. The reactions were studied by the use of gel permeation chromatography, mass spectrometry, and solution viscosity. At temperatures near 400°, depolymerization of some polymer samples was accompanied by the elimination of small amounts of gaseous ClCH2CF3. This constitutes a diagnostic test for the presence of residual P-Cl bonds in the polymer. The depolymerization was also studied in the presence of acidic and basic reagents and in solution: acids accelerate the depolymerization. The reaction mechanisms are discussed. The thermal behavior of [NP(OCH2CF2CF2H)2]n is also described.

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