TY  - JOUR
A1  - Miasnikova, Anna
A1  - Benitez-Montoya, Carlos Adrian
A1  - Laschewsky, André
T1  - Counterintuitive photomodulation of the thermal phase transition of poly(methoxy diethylene glycol acrylate) in aqueous solution by trans-cis isomerization of Copolymerized Azobenzenes
JF  - Macromolecular chemistry and physics
N2  - The non-ionic monomer (methoxy diethylene glycol) acrylate is copolymerized with its azodye-functionalized acrylate analogue using reversible addition-fragmentation chain transfer (RAFT) polymerization. Copolymerization is increasingly difficult with increasing amounts of the azo-dye-bearing monomer. The resulting water-soluble polymers are thermosensitive, exhibiting lower critical solution temperature (LCST) behavior, which can be modulated by the photoinduced trans-cis isomerization of the dye. While already small contents of the hydrophobic azobenzene group reduce the phase-transition temperatures of the copolymers strongly, photoisomerization of the apolar trans-state to the more-polar cis-state has only a small effect, and decreases rather than increases the cloud points.
KW  - azobenzene
KW  - photoisomerization
KW  - statistical copolymers
KW  - thermoresponsive materials
KW  - water-soluble polymers
Y1  - 2013
U6  - https://doi.org/10.1002/macp.201300203
SN  - 1022-1352
VL  - 214
IS  - 13
SP  - 1504
EP  - 1514
PB  - Wiley-VCH
CY  - Weinheim
ER  -