Research groups
  • Double-Thermoresponsive Macromolecules

Contact Information

A.I Virtasen aukio 1, 4th floor,
P.O.Box 55
00014 Helsingin yliopisto
tel. +358 9 1915 0335
fax +358 9 1915 0330

Double-Thermoresponsive Macromolecules

New polymer architectures containing poly(dimethylaminoethyl methacrylate) (PDMAEMA) and poly(ethylene oxide) (PEO) have been synthesized. PDMAEMA is a polymer which can show phase separation at low and high temperature (UCST-type transition at low temperatures and LCST-type transitions at elevated temperatures). E.g. heteroarm star-shaped polymers consisting of four / six arms of PDMAEMA and two arms of PEO were prepared and investigated in buffered solutions. When multivalent counterions are present, they form micelles at low and high temperatures. PEO acts then as the solubilizing part. Also dumbbell-shaped polymers consisting of star-shaped PDMAEMA as compact associating groups at the termini of a PEO spacer containing the same constituents were prepared for use in advanced hydrogel applications. thermoresponsive