Investigation of the cononsolvency effect on micellization behavior of polystyrene-b-poly(N-isopropylacrylamide).
The unusual aggregation behavior of poly(N-isopropylacrylamide)-based amphiphilic block copolymers was investigated by a combination of dynamic and static laser light scattering, AFM, and 1H NMR. The results revealed that PS-b-PNIPAM always forms large micelle aggregates in the transition process from an organic solvent to water due to the cononsolvency effect of PNIPAM. The cononsolvency effect of PNIPAM can be avoided to obtain classical micelles with PS29-b-PNIPAM27 in acetone-water at low temperatures (below 20 degrees C).
Wang
Huan
H
Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China.
An
Yingli
Y
Huang
Nan
N
Ma
Rujiang
R
Shi
Linqi
L