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Preparation and characterisation of aggregating comblike poly(propylene oxide)

Jannasch, Patric LU (2000) In Polymer 41(18). p.6701-6707
Abstract
Poly(propylene oxide)s with a comblike architecture were prepared by using an ethylene-vinyl alcohol copolymer as a macroinitiator for anionic graft polymerisation of propylene oxide. The densely grafted polymers were subsequently modified by capping the terminal hydroxyl groups with hexadecanoyl chloride to produce aggregating polymers. Dilute solution viscometry showed that the hydroxyl and hexadecanoyl content of the uncapped and capped polymers, respectively, largely determined their state of aggregation in methanol and toluene. Thermal analysis of the uncapped polymers in the solid state showed a decrease in glass transition temperature with increasing average molecular weight of the grafts. Analysis of the capped polymers revealed... (More)
Poly(propylene oxide)s with a comblike architecture were prepared by using an ethylene-vinyl alcohol copolymer as a macroinitiator for anionic graft polymerisation of propylene oxide. The densely grafted polymers were subsequently modified by capping the terminal hydroxyl groups with hexadecanoyl chloride to produce aggregating polymers. Dilute solution viscometry showed that the hydroxyl and hexadecanoyl content of the uncapped and capped polymers, respectively, largely determined their state of aggregation in methanol and toluene. Thermal analysis of the uncapped polymers in the solid state showed a decrease in glass transition temperature with increasing average molecular weight of the grafts. Analysis of the capped polymers revealed crystallisation and melting of the hexadecanoyl chain ends in connection with the glass transition of the poly(propylene oxide) phase. It is conceivable that in the solid state the comblike poly(propylene oxide) chains were interconnected by 'micellar-like' microdomains formed by the hexadecanoyl chain ends. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Graft copolymerisation, Comb polymers, Propylene oxide
in
Polymer
volume
41
issue
18
pages
6701 - 6707
publisher
Elsevier
external identifiers
  • scopus:0342493316
ISSN
0032-3861
DOI
10.1016/S0032-3861(00)00028-8
language
English
LU publication?
yes
id
7f4e703f-e472-4215-a992-25496bab185e (old id 149910)
date added to LUP
2007-07-13 12:18:01
date last changed
2017-01-01 06:56:47
@article{7f4e703f-e472-4215-a992-25496bab185e,
  abstract     = {Poly(propylene oxide)s with a comblike architecture were prepared by using an ethylene-vinyl alcohol copolymer as a macroinitiator for anionic graft polymerisation of propylene oxide. The densely grafted polymers were subsequently modified by capping the terminal hydroxyl groups with hexadecanoyl chloride to produce aggregating polymers. Dilute solution viscometry showed that the hydroxyl and hexadecanoyl content of the uncapped and capped polymers, respectively, largely determined their state of aggregation in methanol and toluene. Thermal analysis of the uncapped polymers in the solid state showed a decrease in glass transition temperature with increasing average molecular weight of the grafts. Analysis of the capped polymers revealed crystallisation and melting of the hexadecanoyl chain ends in connection with the glass transition of the poly(propylene oxide) phase. It is conceivable that in the solid state the comblike poly(propylene oxide) chains were interconnected by 'micellar-like' microdomains formed by the hexadecanoyl chain ends.},
  author       = {Jannasch, Patric},
  issn         = {0032-3861},
  keyword      = {Graft copolymerisation,Comb polymers,Propylene oxide},
  language     = {eng},
  number       = {18},
  pages        = {6701--6707},
  publisher    = {Elsevier},
  series       = {Polymer},
  title        = {Preparation and characterisation of aggregating comblike poly(propylene oxide)},
  url          = {http://dx.doi.org/10.1016/S0032-3861(00)00028-8},
  volume       = {41},
  year         = {2000},
}