Abstract
This article reports a study of four poly(ether imide)s with varying ethylene oxide (EO) segments lengths using positron annihilation lifetimes spectroscopy, wide angle X-ray diffraction, and gas transport measurements. The measured properties change with the length of the EO segment. Comparison of the poly(ether imide) containing a single ether linkage with those containing one and three EO units, show progressive changes of the permeability and diffusion coefficient with void size. However, when six EO units are incorporated into the polymer backbone certain of the observed trends are reversed. Incorporation of flexible EO segments in the polymer backbone allows changes in the chain-chain interactions which increases the packing density and changes the void size and influences the solubility coefficients leading to variation of the gas transport characteristics. Differences in the measured solubility parameters reflect the extent to which the gases molecules are able to interact with the polymer matrix. The highest values obtained for the gas separation for carbon dioxide and nitrogen is observed when EO has a value of three. Further increasing of the length of the EO segments in the poly(ether imide) leads to a reduction the gas transport properties and hence the extent to which gas separation would be achieved.
| Language | English |
|---|---|
| Pages | 1654-1662 |
| Number of pages | 9 |
| Journal | Journal of Polymer Science Part B: Polymer Physics |
| Volume | 53 |
| Issue number | 23 |
| Early online date | 16 Jul 2015 |
| DOIs | |
| Publication status | Published - 1 Dec 2015 |
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Keywords
- diffusivity
- permeability
- poly(ether imide)
- positron annihilation lifetime spectroscopy
- solubility coefficient
- wide angel X-ray diffraction
Cite this
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Gas permeation and positron annihilation lifetime spectroscopy of poly(ether imides) containing main chain ethylene oxide segments. / Pethrick, Richard A.; Santamaria-Mendia, Fernan.
In: Journal of Polymer Science Part B: Polymer Physics, Vol. 53, No. 23, 01.12.2015, p. 1654-1662.Research output: Contribution to journal › Article
TY - JOUR
T1 - Gas permeation and positron annihilation lifetime spectroscopy of poly(ether imides) containing main chain ethylene oxide segments
AU - Pethrick, Richard A.
AU - Santamaria-Mendia, Fernan
PY - 2015/12/1
Y1 - 2015/12/1
N2 - This article reports a study of four poly(ether imide)s with varying ethylene oxide (EO) segments lengths using positron annihilation lifetimes spectroscopy, wide angle X-ray diffraction, and gas transport measurements. The measured properties change with the length of the EO segment. Comparison of the poly(ether imide) containing a single ether linkage with those containing one and three EO units, show progressive changes of the permeability and diffusion coefficient with void size. However, when six EO units are incorporated into the polymer backbone certain of the observed trends are reversed. Incorporation of flexible EO segments in the polymer backbone allows changes in the chain-chain interactions which increases the packing density and changes the void size and influences the solubility coefficients leading to variation of the gas transport characteristics. Differences in the measured solubility parameters reflect the extent to which the gases molecules are able to interact with the polymer matrix. The highest values obtained for the gas separation for carbon dioxide and nitrogen is observed when EO has a value of three. Further increasing of the length of the EO segments in the poly(ether imide) leads to a reduction the gas transport properties and hence the extent to which gas separation would be achieved.
AB - This article reports a study of four poly(ether imide)s with varying ethylene oxide (EO) segments lengths using positron annihilation lifetimes spectroscopy, wide angle X-ray diffraction, and gas transport measurements. The measured properties change with the length of the EO segment. Comparison of the poly(ether imide) containing a single ether linkage with those containing one and three EO units, show progressive changes of the permeability and diffusion coefficient with void size. However, when six EO units are incorporated into the polymer backbone certain of the observed trends are reversed. Incorporation of flexible EO segments in the polymer backbone allows changes in the chain-chain interactions which increases the packing density and changes the void size and influences the solubility coefficients leading to variation of the gas transport characteristics. Differences in the measured solubility parameters reflect the extent to which the gases molecules are able to interact with the polymer matrix. The highest values obtained for the gas separation for carbon dioxide and nitrogen is observed when EO has a value of three. Further increasing of the length of the EO segments in the poly(ether imide) leads to a reduction the gas transport properties and hence the extent to which gas separation would be achieved.
KW - diffusivity
KW - permeability
KW - poly(ether imide)
KW - positron annihilation lifetime spectroscopy
KW - solubility coefficient
KW - wide angel X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=84945467758&partnerID=8YFLogxK
UR - http://onlinelibrary.wiley.com/wol1/doi/10.1002/polb.23779/abstract
U2 - 10.1002/polb.23779
DO - 10.1002/polb.23779
M3 - Article
VL - 53
SP - 1654
EP - 1662
JO - Journal of Polymer Science Part B: Polymer Physics
T2 - Journal of Polymer Science Part B: Polymer Physics
JF - Journal of Polymer Science Part B: Polymer Physics
SN - 0887-6266
IS - 23
ER -