Limits to expanding the PN-F series of polyphosphazene elastomers

Zhicheng Tian, Xiao Liu, Abdellatif Manseri, Bruno Ameduri, Harry R. Allcock

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Mixed-substituent fluoroalkoxyphosphazene polymers bearing ∼15% 1H,1H,2H,2H-perfluorooctan-1-oxy or 1H,1H,2H,2H-perfluorodecan-1-oxy side groups together with trifluoroethoxy cosubstituent groups were synthesized. The low reactivity of the long-chain fluoroalkoxides and their limited solubility in organic solvents prevented higher levels of substitution. Moreover, the sodium alkoxides with two methylene residues adjacent to the oxygen proved to be unstable in solution due to elimination of NaF and precipitation of side products, and this limited the time available for chlorine replacement reactions. The resulting cosubstituent polymers were characterized by proton nuclear magnetic resonance (1H-NMR), 31P-NMR, 19F-NMR, gel-permeation chromatography, and differential scanning calorimetry. Unlike homo- or mixed-substituent fluoroalkoxyphosphazene polymers, such as [NP(OCH2CF3)2]n (a microcrystalline thermoplastic, Tg ∼ -63C, Tm ∼ 242C) or [NP(OCH2CF3)(OCH2(CF2) xCF2H)]n (PN-F, a rubbery elastomer, T g ∼ -60C, but no detectable Tm), the new polymers are gums (Tg ∼ -50C, but no detectable Tm) with molecular weights in the 105 g/mol rather than the 106 g/mol range. POLYM. ENG. SCI., 54:1827-1832, 2014.

Original languageEnglish (US)
Pages (from-to)1827-1832
Number of pages6
JournalPolymer Engineering and Science
Volume54
Issue number8
DOIs
StatePublished - Jan 1 2014

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Elastomers
Nuclear magnetic resonance
Polymers
Bearings (structural)
Chlorine
Gel permeation chromatography
Organic solvents
Thermoplastics
Differential scanning calorimetry
Substitution reactions
Solubility
Sodium
Molecular weight
poly(phosphazene)
Oxygen

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Tian, Zhicheng ; Liu, Xiao ; Manseri, Abdellatif ; Ameduri, Bruno ; Allcock, Harry R. / Limits to expanding the PN-F series of polyphosphazene elastomers. In: Polymer Engineering and Science. 2014 ; Vol. 54, No. 8. pp. 1827-1832.
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Limits to expanding the PN-F series of polyphosphazene elastomers. / Tian, Zhicheng; Liu, Xiao; Manseri, Abdellatif; Ameduri, Bruno; Allcock, Harry R.

In: Polymer Engineering and Science, Vol. 54, No. 8, 01.01.2014, p. 1827-1832.

Research output: Contribution to journalArticle

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T1 - Limits to expanding the PN-F series of polyphosphazene elastomers

AU - Tian, Zhicheng

AU - Liu, Xiao

AU - Manseri, Abdellatif

AU - Ameduri, Bruno

AU - Allcock, Harry R.

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