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Synthesis and characterisation of polyethylene graft copolymers

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posted on 2017-10-23, 11:03 authored by Mohammad Azam
Graft copolymers based on a non-polar polyethylene backbone and polar poly(methyl methacrylate) (PMMA), poly(phenyl ethyl methacrylate) (PPHETMA) and poly(butyl acrylate) (PBA) side chains were synthesised by non-ionic grafting onto method. Carboxyl terminated prepolymers and hydroxyl group containing backbones were synthesised and characterised separately and then condensed in a common solvent to form a graft copolymer. Carboxyl terminated prepolymers PMMA, PPHETMA and PBA of molar masses in the range of 1400 to 4400 g mol-1 were prepared by free-radical polymerisation using 4, 4-azobis (4-cyanovaleric acid) (ACVA) as initiator and thioglycollic acid (TGA) as chain transfer agent. Backbones containing hydroxyl groups were synthesised by hydrolysing ethylene-vinyl acetate (EVA) copolymers to ethylene-vinyl alcohol (EVOH) copolymer with a VOH content of 9.8 mole %, with a VOH content of 21 mole % and a partially hydrolysed terpolymer ethylene-vinyl alcohol-vinyl acetate with a VOH content of 8.0 mole %. [Continues.]

Funding

Pakistan, Ministry of Science and Technology.

History

School

  • Science

Department

  • Chemistry

Publisher

© Mohammad Azam

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 2.5 Generic (CC BY-NC-ND 2.5) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by-nc-nd/2.5/

Publication date

1992

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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