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Stimuli responsive graft polysiloxanes
- Source :
- Revista de Chimie, Revista de Chimie, 2013, 64 (6), pp.667-671, Scopus-Elsevier
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; Stimuli sensitive amphiphilic polymers based on partially substituted graft polysiloxanes were obtained and characterized. The polymers were synthesized in a two-step reaction, starting from a polysiloxane with chlorobenzile groups in the side chain. In the first step, the polysiloxane was modified with dinitro- or azo-aromatic group and, in the second step, the unreacted chlorobenzile groups were grafted with thermo-sensitiue poly (N, N-dimethylacrylamide (PDMA) side chains in a Single Electron Transfer-Living Radical Polymerization (SET-LRP) reaction. The polymer structures and their properties were investigated by 1H-NMR spectroscopy, DSC, fluorescence and UV-VIS spectroscopy and rheology. Because of the amphiphilic character, these polymers are self-assembling in aqueous solution in a core-shell micelles, the critical concentration of the aggregation value being in the 10-1 range. The thermo-sensitive character, the lower critical solution temperature (LCST) and the conformational changes of the side-chains are evidenced by rheological temperature sweep tests.
- Subjects :
- [CHIM.MATE] Chemical Sciences/Material chemistry
[CHIM.POLY] Chemical Sciences/Polymers
[CHIM.POLY]Chemical Sciences/Polymers
[CHIM.ORGA]Chemical Sciences/Organic chemistry
stimuli responsive polymers
rheology
[CHIM.MATE]Chemical Sciences/Material chemistry
[CHIM.ORGA] Chemical Sciences/Organic chemistry
dimethylacrylamide
azo-polysiloxane
Subjects
Details
- Language :
- English
- ISSN :
- 15829049 and 26688212
- Database :
- OpenAIRE
- Journal :
- Revista de Chimie, Revista de Chimie, 2013, 64 (6), pp.667-671, Scopus-Elsevier
- Accession number :
- edsair.dedup.wf.001..1429247db04534605778263a81fe17e4