1. Stimuli responsive graft polysiloxanes
- Author
-
Rusu, A. D., Ibanescu, C., Resmerita, E., Simionescu, B., Maricel Danu, Hurduc, V., Ibanescu, S. A., 'Gheorghe Asachi' Technical University of Iasi (TUIASI), Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 'Petru Poni' Institute of Macromolecular Chemistry, This paper was realized with the support of BRAIN 'Doctoral scholarships as an investment in intelligence' project, financed by the European Social Found and Romanian Government. The authors want to thank to ANCS for financial support of this research (Grant 01CEA/2010). Rheological measurements were carriedout in the Laboratory of Rheology of the Interdisciplinary training and research Platform MATMIP (Cod CNCSIS 69/2006). B. S. acknowledges the financial support of 'European Social Fund – Cristofor I. Simionescu Postdoctoral Fellowship Programme' (ID POSDRU/89/1.5/S/55216), Sectorial Operational Programme Human Resources Development 2007 – 2013., Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Le Roy, Léna
- 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 - 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.
- Published
- 2013