TY  - JOUR
A1  - Bogomolova, Anna
A1  - Secker, Christian
A1  - Koetz, Joachim
A1  - Schlaad, Helmut
T1  - Thermo-induced multistep assembly of double-hydrophilic block copolypeptoids in water
JF  - Colloid and polymer science : official journal of the Kolloid-Gesellschaft
N2  - The aqueous solution behavior of thermoresponsive-hydrophilic block copolypeptoids, i.e., poly(N-(n-propyl)glycine) (x) -block-poly(N-methylglycine) (y) (x = 70; y = 23, 42, 76), in the temperature range of 20-45 A degrees C is studied. Turbidimetric analyses of the 0.1 wt% aqueous solutions reveal two cloud points at T (cp)similar to 30 and 45 A degrees C and a clearing point in between at T (cl)similar to 42 A degrees C. Temperature-dependent dynamic light scattering (DLS) suggest that right above the first collapse temperature, single polymer molecules assemble into large structures which upon further heating, i.e., at the clearing point temperature, disassemble into micelle-like structures. Upon further heating, the aggregates start to grow again in size, as recognized by the second cloud point, through a crystallization process.
KW  - Polypeptoids
KW  - Block copolymers
KW  - Thermoresponsive
KW  - Self-assembly
Y1  - 2017
U6  - https://doi.org/10.1007/s00396-017-4044-6
SN  - 0303-402X
SN  - 1435-1536
VL  - 295
SP  - 1305
EP  - 1312
PB  - Springer
CY  - New York
ER  -