Thesis-1992-Azam.pdf (5.26 MB)
Synthesis and characterisation of polyethylene graft copolymers
thesis
posted on 2017-10-23, 11:03 authored by Mohammad AzamGraft 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 AzamPublisher 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
1992Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en