Chapter 3: Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Fluorine-containing polyorganophosphazenes, (NPRF 2)n, constitute one of the largest and best developed areas of inorganic-organic polymer chemistry. Linear high polymers in this class are fire resistant, hydrophobic, fiber-, film- and elastomer-forming materials that, in many cases, have property combinations that cannot be matched by conventional fluorocarbon or non-fluorinated polymers. Most macromolecules of this type are synthesized by using the alkali metal salts of fluoroalcohols or fluorophenols for chlorine-replacement reactions with poly(dichlorophosphazene). This approach allows the synthesis of polymers with only one type of fluorinated side-group, mixed-substituent polymers or block copolymers. Single-substituent polymers in this series generate either semicrystalline or amorphous materials, depending on the length and flexibility of the side-chains. Mixed-substituent polymers are usually amorphous materials that can be covalently crosslinked to generate elastomers. In addition, elastomers have been produced by the incorporation of small percentages of rigid bulky side-groups that favor side-chain interdigitation, a process that leads to physical crosslinking. Finally, fluorophosphazene elastomers are accessible by the incorporation of organosilicon side-groups and by the formation of polyphosphazene-polyorganosilicon block copolymers.

Original languageEnglish (US)
Title of host publicationFluorinated Polymers, Volume 1
Subtitle of host publicationSynthesis, Properties, Processing and Simulation
EditorsBruno Ameduri, Hideo Sawada, Ben Zhong Tang
PublisherRoyal Society of Chemistry
Pages54-79
Number of pages26
Edition24
DOIs
StatePublished - Jan 1 2017

Publication series

NameRSC Polymer Chemistry Series
Number24
Volume2017-January
ISSN (Print)2044-0790
ISSN (Electronic)2044-0804

Fingerprint

Elastomers
Thermoplastics
Polymers
Crystalline materials
Block copolymers
Alkali Metals
Inorganic polymers
Fluorocarbons
Organic Chemistry
Organic polymers
Fluorine
Chlorine
Alkali metals
Macromolecules
Crosslinking
Fires
Salts
Fibers

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Biomaterials
  • Polymers and Plastics

Cite this

Allcock, H. R. (2017). Chapter 3: Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials. In B. Ameduri, H. Sawada, & B. Z. Tang (Eds.), Fluorinated Polymers, Volume 1: Synthesis, Properties, Processing and Simulation (24 ed., pp. 54-79). (RSC Polymer Chemistry Series; Vol. 2017-January, No. 24). Royal Society of Chemistry. https://doi.org/10.1039/9781782629368-00054
Allcock, Harry R. / Chapter 3 : Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials. Fluorinated Polymers, Volume 1: Synthesis, Properties, Processing and Simulation. editor / Bruno Ameduri ; Hideo Sawada ; Ben Zhong Tang. 24. ed. Royal Society of Chemistry, 2017. pp. 54-79 (RSC Polymer Chemistry Series; 24).
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abstract = "Fluorine-containing polyorganophosphazenes, (NPRF 2)n, constitute one of the largest and best developed areas of inorganic-organic polymer chemistry. Linear high polymers in this class are fire resistant, hydrophobic, fiber-, film- and elastomer-forming materials that, in many cases, have property combinations that cannot be matched by conventional fluorocarbon or non-fluorinated polymers. Most macromolecules of this type are synthesized by using the alkali metal salts of fluoroalcohols or fluorophenols for chlorine-replacement reactions with poly(dichlorophosphazene). This approach allows the synthesis of polymers with only one type of fluorinated side-group, mixed-substituent polymers or block copolymers. Single-substituent polymers in this series generate either semicrystalline or amorphous materials, depending on the length and flexibility of the side-chains. Mixed-substituent polymers are usually amorphous materials that can be covalently crosslinked to generate elastomers. In addition, elastomers have been produced by the incorporation of small percentages of rigid bulky side-groups that favor side-chain interdigitation, a process that leads to physical crosslinking. Finally, fluorophosphazene elastomers are accessible by the incorporation of organosilicon side-groups and by the formation of polyphosphazene-polyorganosilicon block copolymers.",
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Allcock, HR 2017, Chapter 3: Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials. in B Ameduri, H Sawada & BZ Tang (eds), Fluorinated Polymers, Volume 1: Synthesis, Properties, Processing and Simulation. 24 edn, RSC Polymer Chemistry Series, no. 24, vol. 2017-January, Royal Society of Chemistry, pp. 54-79. https://doi.org/10.1039/9781782629368-00054

Chapter 3 : Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials. / Allcock, Harry R.

Fluorinated Polymers, Volume 1: Synthesis, Properties, Processing and Simulation. ed. / Bruno Ameduri; Hideo Sawada; Ben Zhong Tang. 24. ed. Royal Society of Chemistry, 2017. p. 54-79 (RSC Polymer Chemistry Series; Vol. 2017-January, No. 24).

Research output: Chapter in Book/Report/Conference proceedingChapter

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Allcock HR. Chapter 3: Structural Diversity in Fluorinated Polyphosphazenes: Exploring the Change from Crystalline Thermoplastics to High-performance Elastomers and Other New Materials. In Ameduri B, Sawada H, Tang BZ, editors, Fluorinated Polymers, Volume 1: Synthesis, Properties, Processing and Simulation. 24 ed. Royal Society of Chemistry. 2017. p. 54-79. (RSC Polymer Chemistry Series; 24). https://doi.org/10.1039/9781782629368-00054