Grafting poly(phenylene oxide) with poly(vinylphosphonic acid) for fuel cell membranes
(2010) In Polymer Chemistry 1(5). p.739-746- Abstract
- Densely phosphonated electrolyte membranes were prepared from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) grafted with poly(vinylphosphonic acid) (PVPA) side chains. In the first step, PPO was lithiated in solution at room temperature by adding n-butyllithium to form an anionic macroinitiatior. Next, diethyl vinylphosphonate (DEVP) was anionically polymerized from the lithiated sites at -78 °C. This protocol gave good control over the density of the grafting sites and the copolymer composition. Films of copolymers containing between 35 and 74 wt% poly(diethyl vinylphosphonate) were first cast from solution, and subsequently fully hydrolyzed to produce transparent flexible proton conducting membranes of PPO-graft-PVPA containing up to 6... (More)
- Densely phosphonated electrolyte membranes were prepared from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) grafted with poly(vinylphosphonic acid) (PVPA) side chains. In the first step, PPO was lithiated in solution at room temperature by adding n-butyllithium to form an anionic macroinitiatior. Next, diethyl vinylphosphonate (DEVP) was anionically polymerized from the lithiated sites at -78 °C. This protocol gave good control over the density of the grafting sites and the copolymer composition. Films of copolymers containing between 35 and 74 wt% poly(diethyl vinylphosphonate) were first cast from solution, and subsequently fully hydrolyzed to produce transparent flexible proton conducting membranes of PPO-graft-PVPA containing up to 6 mmol phosphonic acid groups per gram dry copolymer. Thermogravimetric analysis showed anhydride formation at increasing temperatures above 100 °C with no copolymer degradation occurring until nearly 400 °C under air. Fully hydrated membranes reached proton conductivities above 1 mS/cm at -20 °C and 80 mS/cm at 120 °C. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1554133
- author
- Ingratta, Mark
LU
; Elomaa, Matti
and Jannasch, Patric
LU
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- poly(vinylphosphonic acid), anionic graft polymerizations, polyelectrolytes, grafting, poly(phenylene oxide), polymer electrolyte membrane fuel cells, ionomers
- in
- Polymer Chemistry
- volume
- 1
- issue
- 5
- pages
- 739 - 746
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000279777100023
- scopus:78649697372
- ISSN
- 1759-9954
- DOI
- 10.1039/b9py00390h
- 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
- 2d5f9003-1ac0-41fe-ae19-e7dc17b4e218 (old id 1554133)
- alternative location
- http://www.rsc.org/publishing/journals/PY/article.asp?doi=B9PY00390H
- date added to LUP
- 2016-04-01 09:54:53
- date last changed
- 2022-02-17 04:49:08
@article{2d5f9003-1ac0-41fe-ae19-e7dc17b4e218, abstract = {{Densely phosphonated electrolyte membranes were prepared from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) grafted with poly(vinylphosphonic acid) (PVPA) side chains. In the first step, PPO was lithiated in solution at room temperature by adding n-butyllithium to form an anionic macroinitiatior. Next, diethyl vinylphosphonate (DEVP) was anionically polymerized from the lithiated sites at -78 °C. This protocol gave good control over the density of the grafting sites and the copolymer composition. Films of copolymers containing between 35 and 74 wt% poly(diethyl vinylphosphonate) were first cast from solution, and subsequently fully hydrolyzed to produce transparent flexible proton conducting membranes of PPO-graft-PVPA containing up to 6 mmol phosphonic acid groups per gram dry copolymer. Thermogravimetric analysis showed anhydride formation at increasing temperatures above 100 °C with no copolymer degradation occurring until nearly 400 °C under air. Fully hydrated membranes reached proton conductivities above 1 mS/cm at -20 °C and 80 mS/cm at 120 °C.}}, author = {{Ingratta, Mark and Elomaa, Matti and Jannasch, Patric}}, issn = {{1759-9954}}, keywords = {{poly(vinylphosphonic acid); anionic graft polymerizations; polyelectrolytes; grafting; poly(phenylene oxide); polymer electrolyte membrane fuel cells; ionomers}}, language = {{eng}}, number = {{5}}, pages = {{739--746}}, publisher = {{Royal Society of Chemistry}}, series = {{Polymer Chemistry}}, title = {{Grafting poly(phenylene oxide) with poly(vinylphosphonic acid) for fuel cell membranes}}, url = {{http://dx.doi.org/10.1039/b9py00390h}}, doi = {{10.1039/b9py00390h}}, volume = {{1}}, year = {{2010}}, }