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Modifications of polyimides and polyimide–inorganic oxide hybrids with perfluoroether oligomers for use as matrices for carbon-fibre composites

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posted on 31.10.2018 by Seok-Hoon Sim
The performance of a polyimide derived from a low molecular weight polyamic acid (Skybond 703) and the corresponding polyimide–silica hybrids, used as matrices for Carbon-fibre composites, was evaluated. The study involved the incorporation of telechelically modified perfluoroether oligomers into the resin systems. Telechelic modifications of the hydroxyl-terminated perfluoroether oligomer were carried out in order to achieve the required compatibility with the polyimide phase through grafting reactions with the polyamic acid precursor. In the case of hybrids, the compatibility requirements were extended also to the prehydrolysed alkoxysilane solution added to the polyamic acid mixtures. The latter was achieved with the incorporation of a silane coupling agent (γ-glycidyloxypropyltrimethoxysilane), which resulted in the formation of nano-scale silica domains in the polyimide. [Continues.]

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Publisher

© S.H. Sim

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2004

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.

Language

en

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