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Polyphosphazenes as an Example of the Element-Blocks Approach to New Materials

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Abstract

Polyphosphazenes are inorganic-organic high polymers with a backbone of alternating phosphorus and nitrogen atoms and two organic or organometallic side groups attached to each phosphorus. Most of these polymers are synthesized by macromolecular substitution reactions carried out on poly(dichlorophosphazene), (NPCl2)n. The chlorine substitution reactions involve alkoxides, aryloxides, primary or secondary amines, or a range of organometallic reagents. Structural variations are accomplished via the use of one, two, or more different nucleophiles and substituents along the polymer chain and by the employment of reagent size and reactivity to control polymer properties and emphasize specific uses. Applications have been developed for these polymers as elastomers, thermoplastics, biostable or bioerodible medical materials, fire-resistant lithium battery electrolytes, films, or foams, and gas and liquid separation membranes.

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Authors and Affiliations

  1. Department of Chemistry, The Pennsylvania State University, University Park, PA, USA

    Harry R. Allcock

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  1. Harry R. Allcock
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Correspondence to Harry R. Allcock .

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  1. Department of Polymer Chemistry, Kyoto University, Kyoto, Japan

    Yoshiki Chujo

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Allcock, H.R. (2019). Polyphosphazenes as an Example of the Element-Blocks Approach to New Materials. In: Chujo, Y. (eds) New Polymeric Materials Based on Element-Blocks. Springer, Singapore. https://doi.org/10.1007/978-981-13-2889-3_10

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