TY  - JOUR
A1  - Mertoglu, Murat
A1  - Garnier, Sebastien
A1  - Laschewsky, André
A1  - Skrabania, Katja
A1  - Storsberg, J.
T1  - Stimuli responsive amphiphilic block copolymers for aqueous media synthesised via reversible addition fragmentation chain transfer polymerisation (RAFT)
N2  - A series of RAFT agents was synthesised, and used to prepare various ionic. non-ionic and zwitterionic water- soluble polymers, in organic as well as in aqueous media. The RAFT process proved to be a powerful method to prepare functional polymers of complex structure. such as amphiphilic diblock and triblock copolymers. This includes polymers containing one or even two stimuli-sensitive hydrophilic blocks. Switching the hydrophilic character of a single or of several blocks by changing the PH, the temperature or the salt content demonstrated the variability of the molecular designs suited for stimuli-sensitive polymeric amphiphiles, and exemplified the concept of multiple-sensitive systems. (c) 2005 Published by Elsevier Ltd
Y1  - 2005
SN  - 0032-3861
ER  - 
TY  - JOUR
A1  - Mertoglu, Murat
A1  - Laschewsky, André
A1  - Skrabania, Katja
A1  - Wieland, C.
T1  - New water soluble agents for reversible addition-fragmentation chain transfer polymerization and their application in aqueous solutions
N2  - A series of nonionic, anionic, and cationic water-soluble monomers bearing the (meth)acrylate, (meth)acrylamide, or styrene moiety were polymerized in water by free-radical polymerization via reversible addition- fragmentation chain transfer (RAFT). Several new water-soluble RAFT agents based on dithiobenzoate were employed that are water soluble independently of the pH. One of them bears a fluorophore, enabling unsymmetrical double end-group labeling as well as the preparation of fluorescent-labeled polymers. The temperature-dependent stability of the new RAFT agents against hydrolysis was studied. Controlled polymerization in aqueous solution was possible with styrenic, acrylic, and methacrylic monomers; molar masses increase with conversion, and polydispersities are relatively low. But RAFT polymerization failed for an anionic itaconate. Whereas polymerizations of methacrylamides were slow at temperatures below 60 degrees C, such conditions proved favorable for the RAFT polymerization of acrylates and methacrylates, to minimize hydrolysis of the dithioester end-group functionality, and to improve the preparation of block copolymers
Y1  - 2005
SN  - 0024-9297
ER  - 
TY  - JOUR
A1  - Baussard, Jean-Francois
A1  - Habib-Jiwan, Jean-Louis
A1  - Laschewsky, André
A1  - Mertoglu, Murat
A1  - Storsberg, Joachim
T1  - New chain transfer agents for reversible addition-fragmentation chain transfer (RAFT) polymerisation in aqueous media : 1. Synthesis and stability in water
N2  - New chain transfer agents for free radical polymerisation via reversible addition-fragmentation chain transfer (RAFT) were synthesised that are particularly suited for aqueous solution polymerisation. The new compounds bear dithioester and trithiocarbonate moieties as well as permanently ionic groups to confer solubility in water. Their stability against hydrolysis was studied, and compared with the one of a frequently employed water-soluble RAFT agent, using UV-Vis-spectroscopy and H-1-NMR measurements. An improved resistance to hydrolysis was found for the new RAFT agents compared to the reference one, providing good stabilities in the pH range between 1 and 8, and up to temperatures of 70 degreesC. (C) 2004 Elsevier Ltd. All rights reserved
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Laschewsky, André
A1  - Garnier, Sebastien
A1  - Kirsten, Juliane
A1  - Mertoglu, Murat
A1  - Skrabania, Katja
A1  - Lutz, Jean-Francois
T1  - Comb-like polymeric surfactants by combining block and graft copolymer architectures
Y1  - 2006
SN  - 0065-7727
ER  -