Block copolymers containing intrinsically proton-conducting blocks tethered with benzimidazole units
Persson, Christian LU and Jannasch, Patric LU
(2006)
In Chemistry of Materials
18(13).
p.3096-3102
- Abstract
- ABA triblock copolymers having benzimidazole-tethered end blocks have been prepared and characterized with respect to their intrinsically proton conducting properties. The copolymers were synthesized by using a linear poly(ethylene oxide) (PEO) as a difunctional macroinitiator for the anionic ring-opening polymerization of allyl glycidyl ether. The pendent allyl groups of the end blocks were subsequently linked with 2-(2-benzimidazolyl)ethanethiol via a free radical thiol-ene coupling reaction. Thermogravimetry showed that the final materials were stable up to 210 C under a nitrogen atmosphere. The benzimidazole units of the copolymers were found to crystallize from solution but not from the melt. After heating the materials above the... (More)
- ABA triblock copolymers having benzimidazole-tethered end blocks have been prepared and characterized with respect to their intrinsically proton conducting properties. The copolymers were synthesized by using a linear poly(ethylene oxide) (PEO) as a difunctional macroinitiator for the anionic ring-opening polymerization of allyl glycidyl ether. The pendent allyl groups of the end blocks were subsequently linked with 2-(2-benzimidazolyl)ethanethiol via a free radical thiol-ene coupling reaction. Thermogravimetry showed that the final materials were stable up to 210 C under a nitrogen atmosphere. The benzimidazole units of the copolymers were found to crystallize from solution but not from the melt. After heating the materials above the melting point of benzimidazole units, the copolymers displayed single glass transitions temperatures (Tg's). Moreover, the crystallization of the PEO blocks was depressed which may indicate a high degree of interaction between the dissimilar blocks. The proton conductivity was found to be promoted by a high benzimidazole concentration and a high segmental mobility, that is, low Tg's of the copolymers. Increased concentrations of benzimidazole raised the Tg, and the resulting conductivity thus depended on a balance between the charge carrier density and the mobility. Conductivities close to 80 μS/cm were reached at 160 C by these materials under completely anhydrous conditions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157771
- author
- Persson, Christian
LU
and Jannasch, Patric
LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Chemistry of Materials
- volume
- 18
- issue
- 13
- pages
- 3096 - 3102
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000238386000023
- scopus:33746369755
- ISSN
- 0897-4756
- DOI
- 10.1021/cm0602848
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- aa46f011-3756-4c5a-b4e9-8c23f009ac47 (old id 157771)
- date added to LUP
- 2016-04-01 12:13:58
- date last changed
- 2022-02-18 19:44:17
@article{aa46f011-3756-4c5a-b4e9-8c23f009ac47,
abstract = {{ABA triblock copolymers having benzimidazole-tethered end blocks have been prepared and characterized with respect to their intrinsically proton conducting properties. The copolymers were synthesized by using a linear poly(ethylene oxide) (PEO) as a difunctional macroinitiator for the anionic ring-opening polymerization of allyl glycidyl ether. The pendent allyl groups of the end blocks were subsequently linked with 2-(2-benzimidazolyl)ethanethiol via a free radical thiol-ene coupling reaction. Thermogravimetry showed that the final materials were stable up to 210 C under a nitrogen atmosphere. The benzimidazole units of the copolymers were found to crystallize from solution but not from the melt. After heating the materials above the melting point of benzimidazole units, the copolymers displayed single glass transitions temperatures (Tg's). Moreover, the crystallization of the PEO blocks was depressed which may indicate a high degree of interaction between the dissimilar blocks. The proton conductivity was found to be promoted by a high benzimidazole concentration and a high segmental mobility, that is, low Tg's of the copolymers. Increased concentrations of benzimidazole raised the Tg, and the resulting conductivity thus depended on a balance between the charge carrier density and the mobility. Conductivities close to 80 μS/cm were reached at 160 C by these materials under completely anhydrous conditions.}},
author = {{Persson, Christian and Jannasch, Patric}},
issn = {{0897-4756}},
language = {{eng}},
number = {{13}},
pages = {{3096--3102}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Chemistry of Materials}},
title = {{Block copolymers containing intrinsically proton-conducting blocks tethered with benzimidazole units}},
url = {{http://dx.doi.org/10.1021/cm0602848}},
doi = {{10.1021/cm0602848}},
volume = {{18}},
year = {{2006}},
}