CATIONIC MECHANISM FOR THE RING-OPENING POLYMERIZATION OF PHOSPHAZENES.

Harry R. Allcock, David J. Brennan, Mark S. Connolly, James L. Desorcie

Research output: Contribution to journalConference article

Abstract

The polymerization of cyclophosphazenes to linear high polymers appears to proceed through mechanism that involves ionization of halogen atoms from phosphorus, followed by cationic attack by a phosphazenium ion on other trimeric or tetrameric molecules. These reactions involve ring-ring and ring-chain equilibria that are sensitive to the nature of the side groups. In addition, the presence of cyclosiloxanes in the polymerization system generates a series of phosphazenesiloxane interactions that reinforce the evidence for a cationic polymerization mechanism for phosphazenes.

Original languageEnglish (US)
Number of pages1
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume26
Issue number1
StatePublished - Apr 1 1985

Fingerprint

Ring opening polymerization
Polymerization
Cationic polymerization
Halogens
Phosphorus
Ionization
Polymers
Ions
Atoms
Molecules

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics

Cite this

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abstract = "The polymerization of cyclophosphazenes to linear high polymers appears to proceed through mechanism that involves ionization of halogen atoms from phosphorus, followed by cationic attack by a phosphazenium ion on other trimeric or tetrameric molecules. These reactions involve ring-ring and ring-chain equilibria that are sensitive to the nature of the side groups. In addition, the presence of cyclosiloxanes in the polymerization system generates a series of phosphazenesiloxane interactions that reinforce the evidence for a cationic polymerization mechanism for phosphazenes.",
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CATIONIC MECHANISM FOR THE RING-OPENING POLYMERIZATION OF PHOSPHAZENES. / Allcock, Harry R.; Brennan, David J.; Connolly, Mark S.; Desorcie, James L.

In: American Chemical Society, Polymer Preprints, Division of Polymer Chemistry, Vol. 26, No. 1, 01.04.1985.

Research output: Contribution to journalConference article

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T1 - CATIONIC MECHANISM FOR THE RING-OPENING POLYMERIZATION OF PHOSPHAZENES.

AU - Allcock, Harry R.

AU - Brennan, David J.

AU - Connolly, Mark S.

AU - Desorcie, James L.

PY - 1985/4/1

Y1 - 1985/4/1

N2 - The polymerization of cyclophosphazenes to linear high polymers appears to proceed through mechanism that involves ionization of halogen atoms from phosphorus, followed by cationic attack by a phosphazenium ion on other trimeric or tetrameric molecules. These reactions involve ring-ring and ring-chain equilibria that are sensitive to the nature of the side groups. In addition, the presence of cyclosiloxanes in the polymerization system generates a series of phosphazenesiloxane interactions that reinforce the evidence for a cationic polymerization mechanism for phosphazenes.

AB - The polymerization of cyclophosphazenes to linear high polymers appears to proceed through mechanism that involves ionization of halogen atoms from phosphorus, followed by cationic attack by a phosphazenium ion on other trimeric or tetrameric molecules. These reactions involve ring-ring and ring-chain equilibria that are sensitive to the nature of the side groups. In addition, the presence of cyclosiloxanes in the polymerization system generates a series of phosphazenesiloxane interactions that reinforce the evidence for a cationic polymerization mechanism for phosphazenes.

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