Comb graft copolymers : synthesis, micellisation and dispersant behaviour

Styryl-terminated polystyrene macromonomers have been synthesised by the anionic polymerisation of styrene. Initiation was by sec-butyl lithium; termination involved the addition of diphenylethylene prior to vinyl benzyl chloride. Characterisation of the macromonomers was performed using gel permeat...

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Main Author:	Mark G. Branch
Format:	Default Thesis
Published:	1992
Subjects:	Other chemical sciences not elsewhere classified untagged Chemical Sciences not elsewhere classified
Online Access:	https://hdl.handle.net/2134/10396
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spelling	rr-article-93981981992-01-01T00:00:00Z Comb graft copolymers : synthesis, micellisation and dispersant behaviour Mark G. Branch (7166696) Other chemical sciences not elsewhere classified untagged Chemical Sciences not elsewhere classified Styryl-terminated polystyrene macromonomers have been synthesised by the anionic polymerisation of styrene. Initiation was by sec-butyl lithium; termination involved the addition of diphenylethylene prior to vinyl benzyl chloride. Characterisation of the macromonomers was performed using gel permeation chromatography (GPC) and proton nuclear magnetic resonance spectroscopy (nmr). Novel comb graft copolymers were synthesised by the copolymerisation of the macromonomer with a comonomer. The following comonomers were used: Z-vinylpyridine (Z-VP), 4- vinylpyridine (4-VP) and N-(vinylbenzyl)pyrrolidone (VBP). Graft copolymers were made with a range of compositions by varying the feed ratios of the comonomer to the macromonomer. Reactivity ratios were determined for the different graft copolymer systems and compared to the simple statistical copolymerisation of styrene with comonomer. Characterisation of the graft copolymers was performed using GPC, nmr and membrane osmometry. Micellar dispersions of the comb graft copolymers were prepared in cyclohexane, toluene and methanol. These were subsequently characterised by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Micellar behaviour was related to graft copolymer composition and structure. The graft copolymers were subsequently used as steric stabilisers in dispersion polymerisations of bis-hydroxyethyl terephthalate in high boiling aliphatic hydrocarbon, methyl methacrylate in cyclohexane, vinyl pyridine in toluene/cyclohexane and styrene in methanol. A number of parameters have been investigated including initiator, stabiliser and monomer concentrations. Graft copolymer composition and structure were shown to be important factors for the effective steric stabilisation of polymer particles in conjunction with information on surface coverage data. 1992-01-01T00:00:00Z Text Thesis 2134/10396 https://figshare.com/articles/thesis/Comb_graft_copolymers_synthesis_micellisation_and_dispersant_behaviour/9398198 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Other chemical sciences not elsewhere classified untagged Chemical Sciences not elsewhere classified
spellingShingle	Other chemical sciences not elsewhere classified untagged Chemical Sciences not elsewhere classified Mark G. Branch Comb graft copolymers : synthesis, micellisation and dispersant behaviour
description	Styryl-terminated polystyrene macromonomers have been synthesised by the anionic polymerisation of styrene. Initiation was by sec-butyl lithium; termination involved the addition of diphenylethylene prior to vinyl benzyl chloride. Characterisation of the macromonomers was performed using gel permeation chromatography (GPC) and proton nuclear magnetic resonance spectroscopy (nmr). Novel comb graft copolymers were synthesised by the copolymerisation of the macromonomer with a comonomer. The following comonomers were used: Z-vinylpyridine (Z-VP), 4- vinylpyridine (4-VP) and N-(vinylbenzyl)pyrrolidone (VBP). Graft copolymers were made with a range of compositions by varying the feed ratios of the comonomer to the macromonomer. Reactivity ratios were determined for the different graft copolymer systems and compared to the simple statistical copolymerisation of styrene with comonomer. Characterisation of the graft copolymers was performed using GPC, nmr and membrane osmometry. Micellar dispersions of the comb graft copolymers were prepared in cyclohexane, toluene and methanol. These were subsequently characterised by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Micellar behaviour was related to graft copolymer composition and structure. The graft copolymers were subsequently used as steric stabilisers in dispersion polymerisations of bis-hydroxyethyl terephthalate in high boiling aliphatic hydrocarbon, methyl methacrylate in cyclohexane, vinyl pyridine in toluene/cyclohexane and styrene in methanol. A number of parameters have been investigated including initiator, stabiliser and monomer concentrations. Graft copolymer composition and structure were shown to be important factors for the effective steric stabilisation of polymer particles in conjunction with information on surface coverage data.
format	Default Thesis
author	Mark G. Branch
author_facet	Mark G. Branch
author_sort	Mark G. Branch (7166696)
title	Comb graft copolymers : synthesis, micellisation and dispersant behaviour
title_short	Comb graft copolymers : synthesis, micellisation and dispersant behaviour
title_full	Comb graft copolymers : synthesis, micellisation and dispersant behaviour
title_fullStr	Comb graft copolymers : synthesis, micellisation and dispersant behaviour
title_full_unstemmed	Comb graft copolymers : synthesis, micellisation and dispersant behaviour
title_sort	comb graft copolymers : synthesis, micellisation and dispersant behaviour
publishDate	1992
url	https://hdl.handle.net/2134/10396
_version_	1797469323414994944

Comb graft copolymers : synthesis, micellisation and dispersant behaviour

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