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Structure and mobility in water plasticized poly(ethylene oxide)

Trotzig, Charlotte LU ; Abrahmsen-Alami, Susanna and Maurer, Frans LU (2007) In Polymer 48(11). p.3294-3305
Abstract
The change in structure and mobility of poly(ethylene oxide) (PEO) containing 2 wt% of fumed silica and the water self-diffusion coefficient in concentrated PEO-water systems have been investigated at room temperature in the water weight fraction, w(w) range 0-0.50 w/w. Pulsed field gradient nuclear magnetic resonance was used to measure the self-diffusion coefficients. Structure and mobility properties of PEO were measured with differential scanning calorimetry as well as with positron annihilation lifetime spectroscopy. The largest reduction of the degree of crystallinity of PEO was observed when ww was increased from 0.13 w/w to 0.50 w/w. Moreover, water induced relaxation of the PEO segments in the amorphous phase, which seemed to have... (More)
The change in structure and mobility of poly(ethylene oxide) (PEO) containing 2 wt% of fumed silica and the water self-diffusion coefficient in concentrated PEO-water systems have been investigated at room temperature in the water weight fraction, w(w) range 0-0.50 w/w. Pulsed field gradient nuclear magnetic resonance was used to measure the self-diffusion coefficients. Structure and mobility properties of PEO were measured with differential scanning calorimetry as well as with positron annihilation lifetime spectroscopy. The largest reduction of the degree of crystallinity of PEO was observed when ww was increased from 0.13 w/w to 0.50 w/w. Moreover, water induced relaxation of the PEO segments in the amorphous phase, which seemed to have been strained by the crystals during compression molding. The water self-diffusion coefficient increased logarithmically with increased water content below water weight fractions in the amorphous phase of 0.30 w/w and the water molecules were obstructed by the crystalline phase. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Polymer
volume
48
issue
11
pages
3294 - 3305
publisher
Elsevier
external identifiers
  • wos:000246934600029
  • scopus:34248147410
ISSN
0032-3861
DOI
10.1016/j.polymer.2007.03.047
language
English
LU publication?
yes
id
12842ec0-19fa-4a06-b4b1-99463e7a1653 (old id 541347)
alternative location
http://dx.doi.org/10.1016/j.polymer.2007.03.047
date added to LUP
2007-10-31 15:46:02
date last changed
2017-04-02 04:04:10
@article{12842ec0-19fa-4a06-b4b1-99463e7a1653,
  abstract     = {The change in structure and mobility of poly(ethylene oxide) (PEO) containing 2 wt% of fumed silica and the water self-diffusion coefficient in concentrated PEO-water systems have been investigated at room temperature in the water weight fraction, w(w) range 0-0.50 w/w. Pulsed field gradient nuclear magnetic resonance was used to measure the self-diffusion coefficients. Structure and mobility properties of PEO were measured with differential scanning calorimetry as well as with positron annihilation lifetime spectroscopy. The largest reduction of the degree of crystallinity of PEO was observed when ww was increased from 0.13 w/w to 0.50 w/w. Moreover, water induced relaxation of the PEO segments in the amorphous phase, which seemed to have been strained by the crystals during compression molding. The water self-diffusion coefficient increased logarithmically with increased water content below water weight fractions in the amorphous phase of 0.30 w/w and the water molecules were obstructed by the crystalline phase.},
  author       = {Trotzig, Charlotte and Abrahmsen-Alami, Susanna and Maurer, Frans},
  issn         = {0032-3861},
  language     = {eng},
  number       = {11},
  pages        = {3294--3305},
  publisher    = {Elsevier},
  series       = {Polymer},
  title        = {Structure and mobility in water plasticized poly(ethylene oxide)},
  url          = {http://dx.doi.org/10.1016/j.polymer.2007.03.047},
  volume       = {48},
  year         = {2007},
}