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PARVIS Report Summary

Project ID: G4RD-CT-2001-00495
Funded under: FP5-GROWTH
Country: France

Polyphosphazene material

This part of the research is focused on an innovating material not yet available in the market. Synthetic procedures must be optimised in order to both obtain the proper material with a reasonable yield and to facilitated their conversion to industrial scale.

Polyphosphazenes are inorganic macromolecules that illustrate the possibilities available for a wide range of other inorganic systems. They comprise some of the most intensively studied inorganic macromolecules. Polyphosphazenes are high molecular weight, essentially linear polymers with alternating phosphorus and nitrogen atoms in the skeleton and two side groups attached to each phosphorus.

Most polymers of this type resist burning or oxidative breakdown better than single strand organic polymers. Nearly all are highly stable to water and to a wide range of chemical agents. In overall performance, they are superior to the hydrocarbon rubbers and competitive with the silicones in applications that require stability over a broad temperature range.

Depending on the type of the side groups of the polyphosphazene several elastomers can be obtained. Given the outstanding properties of the polyphosphazenes studied until now, the suitable development of a new type of this polymer designed for damping purposes.

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