Synthesis of novel aggregating comb-shaped polyethers for use as polymer electrolytes
Jannasch, Patric LU
(2000)
In Macromolecules
33(23).
p.8604-8610
- Abstract
- Polyethers having well-defined comb-shaped architectures were prepared by using poly(4-hydroxystyrene) (PHSt) as a multifunctional initiator for graft polymerization of either ethylene oxide (EO) or a mixture of EO and propylene oxide (PO). The grafting process was performed in 1,4-dioxane using NaH as ionizer for the PHSt hydroxyl groups. The precursor PHSt was prepared by first polymerizing 4-tert-butoxystyrene, using butyllithium as initiator in THF at -60 degreesC, and then deprotecting the butoxy groups. Finally, the terminal hydroxyl groups of the polyether grafts were end-capped with hexadecanoyl units through esterification. The monomer addition sequence in the graft copolymerizations with the same EO/PO feed ratio proved to have a... (More)
- Polyethers having well-defined comb-shaped architectures were prepared by using poly(4-hydroxystyrene) (PHSt) as a multifunctional initiator for graft polymerization of either ethylene oxide (EO) or a mixture of EO and propylene oxide (PO). The grafting process was performed in 1,4-dioxane using NaH as ionizer for the PHSt hydroxyl groups. The precursor PHSt was prepared by first polymerizing 4-tert-butoxystyrene, using butyllithium as initiator in THF at -60 degreesC, and then deprotecting the butoxy groups. Finally, the terminal hydroxyl groups of the polyether grafts were end-capped with hexadecanoyl units through esterification. The monomer addition sequence in the graft copolymerizations with the same EO/PO feed ratio proved to have a great influence on the crystallization temperature and the crystallinity of the grafts. Also, the end-capping was found to reduce the degree of crystallinity as compared to the corresponding uncapped polymers. Solid polymer electrolytes containing lithium triflate (LiSO3-CF3) salt had ambient temperature ion conductivities of similar to 10(-5) S/cm at [Li]/[O] = 0.025. Thermal analysis of the electrolytes showed that the polymers aggregated through phase separation of the hexadecanoyl chain ends. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/150762
- author
- Jannasch, Patric
LU
- organization
- publishing date
- 2000
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Macromolecules
- volume
- 33
- issue
- 23
- pages
- 8604 - 8610
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:0034314414
- ISSN
- 0024-9297
- DOI
- 10.1021/ma0007841
- 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
- 54987c02-35bf-4fd8-91f8-017b44a4f1e6 (old id 150762)
- date added to LUP
- 2016-04-01 11:44:57
- date last changed
- 2022-01-26 17:39:57
@article{54987c02-35bf-4fd8-91f8-017b44a4f1e6,
abstract = {{Polyethers having well-defined comb-shaped architectures were prepared by using poly(4-hydroxystyrene) (PHSt) as a multifunctional initiator for graft polymerization of either ethylene oxide (EO) or a mixture of EO and propylene oxide (PO). The grafting process was performed in 1,4-dioxane using NaH as ionizer for the PHSt hydroxyl groups. The precursor PHSt was prepared by first polymerizing 4-tert-butoxystyrene, using butyllithium as initiator in THF at -60 degreesC, and then deprotecting the butoxy groups. Finally, the terminal hydroxyl groups of the polyether grafts were end-capped with hexadecanoyl units through esterification. The monomer addition sequence in the graft copolymerizations with the same EO/PO feed ratio proved to have a great influence on the crystallization temperature and the crystallinity of the grafts. Also, the end-capping was found to reduce the degree of crystallinity as compared to the corresponding uncapped polymers. Solid polymer electrolytes containing lithium triflate (LiSO3-CF3) salt had ambient temperature ion conductivities of similar to 10(-5) S/cm at [Li]/[O] = 0.025. Thermal analysis of the electrolytes showed that the polymers aggregated through phase separation of the hexadecanoyl chain ends.}},
author = {{Jannasch, Patric}},
issn = {{0024-9297}},
language = {{eng}},
number = {{23}},
pages = {{8604--8610}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Macromolecules}},
title = {{Synthesis of novel aggregating comb-shaped polyethers for use as polymer electrolytes}},
url = {{http://dx.doi.org/10.1021/ma0007841}},
doi = {{10.1021/ma0007841}},
volume = {{33}},
year = {{2000}},
}