The Thermal Breakdown of Poly(diphenoxyphosphazene)

Harry R. Allcock, G. Y. Moore, W. J. Cook

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Poly (diphenoxyphosphazene), [NP(OC6H5)2]n was subjected to thermal degradation studies over the temperature range of 100–400°, and the reaction products were analyzed by gel permeation chromatography, solution viscosity, and mass spectrometry. A general lowering of the molecular weight with increasing temperature was observed at temperatures above 100°. An initial sharp decrease in molecular weight was ascribed to chain cleavage at weak points along the backbone, and the formation of cyclic oligomers appeared to result from a subsequent cyclization-depolymerization process. The mechanism whereby chlorobenzene is formed as a trace fragmentation species is discussed. Depolymerizations in solution at temperatures between 30 and 161° were also studied.

Original languageEnglish (US)
Pages (from-to)571-575
Number of pages5
JournalMacromolecules
Volume7
Issue number5
DOIs
StatePublished - Sep 1 1974

Fingerprint

Depolymerization
Molecular weight
Temperature
Cyclization
Gel permeation chromatography
Reaction products
Oligomers
Mass spectrometry
Pyrolysis
Viscosity
Hot Temperature
chlorobenzene

All Science Journal Classification (ASJC) codes

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

Cite this

Allcock, Harry R. ; Moore, G. Y. ; Cook, W. J. / The Thermal Breakdown of Poly(diphenoxyphosphazene). In: Macromolecules. 1974 ; Vol. 7, No. 5. pp. 571-575.
@article{021d51086aeb447d8ce085d17198bea1,
title = "The Thermal Breakdown of Poly(diphenoxyphosphazene)",
abstract = "Poly (diphenoxyphosphazene), [NP(OC6H5)2]n was subjected to thermal degradation studies over the temperature range of 100–400°, and the reaction products were analyzed by gel permeation chromatography, solution viscosity, and mass spectrometry. A general lowering of the molecular weight with increasing temperature was observed at temperatures above 100°. An initial sharp decrease in molecular weight was ascribed to chain cleavage at weak points along the backbone, and the formation of cyclic oligomers appeared to result from a subsequent cyclization-depolymerization process. The mechanism whereby chlorobenzene is formed as a trace fragmentation species is discussed. Depolymerizations in solution at temperatures between 30 and 161° were also studied.",
author = "Allcock, {Harry R.} and Moore, {G. Y.} and Cook, {W. J.}",
year = "1974",
month = "9",
day = "1",
doi = "10.1021/ma60041a007",
language = "English (US)",
volume = "7",
pages = "571--575",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "5",

}

The Thermal Breakdown of Poly(diphenoxyphosphazene). / Allcock, Harry R.; Moore, G. Y.; Cook, W. J.

In: Macromolecules, Vol. 7, No. 5, 01.09.1974, p. 571-575.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The Thermal Breakdown of Poly(diphenoxyphosphazene)

AU - Allcock, Harry R.

AU - Moore, G. Y.

AU - Cook, W. J.

PY - 1974/9/1

Y1 - 1974/9/1

N2 - Poly (diphenoxyphosphazene), [NP(OC6H5)2]n was subjected to thermal degradation studies over the temperature range of 100–400°, and the reaction products were analyzed by gel permeation chromatography, solution viscosity, and mass spectrometry. A general lowering of the molecular weight with increasing temperature was observed at temperatures above 100°. An initial sharp decrease in molecular weight was ascribed to chain cleavage at weak points along the backbone, and the formation of cyclic oligomers appeared to result from a subsequent cyclization-depolymerization process. The mechanism whereby chlorobenzene is formed as a trace fragmentation species is discussed. Depolymerizations in solution at temperatures between 30 and 161° were also studied.

AB - Poly (diphenoxyphosphazene), [NP(OC6H5)2]n was subjected to thermal degradation studies over the temperature range of 100–400°, and the reaction products were analyzed by gel permeation chromatography, solution viscosity, and mass spectrometry. A general lowering of the molecular weight with increasing temperature was observed at temperatures above 100°. An initial sharp decrease in molecular weight was ascribed to chain cleavage at weak points along the backbone, and the formation of cyclic oligomers appeared to result from a subsequent cyclization-depolymerization process. The mechanism whereby chlorobenzene is formed as a trace fragmentation species is discussed. Depolymerizations in solution at temperatures between 30 and 161° were also studied.

UR - http://www.scopus.com/inward/record.url?scp=0342409540&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0342409540&partnerID=8YFLogxK

U2 - 10.1021/ma60041a007

DO - 10.1021/ma60041a007

M3 - Article

AN - SCOPUS:0342409540

VL - 7

SP - 571

EP - 575

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 5

ER -