TY  - JOUR
A1  - Schöne, Anne-Christin
A1  - Richau, Klaus
A1  - Kratz, Karl
A1  - Schulz, Burkhard
A1  - Lendlein, Andreas
T1  - Influence of Diurethane Linkers on the Langmuir Layer Behavior of Oligo[(rac-lactide)-co-glycolide]-based Polyesterurethanes
T2  - Macromolecular rapid communications
N2  - Three oligo[(rac-lactide)-co-glycolide] based polyesterurethanes (OLGA-PUs) containing different diurethane linkers are investigated by the Langmuir monolayer technique and compared to poly[(rac-lactide)-co-glycolide] (PLGA) to elucidate the influence of the diurethane junction units on hydrophilicity and packing motifs of these polymers at the air-water interface. The presence of diurethane linkers does not manifest itself in the Langmuir layer behavior both in compression and expansion experiments when monomolecular films of OLGA-PUs are spread on the water surface. However, the linker retard the evolution of morphological structures at intermediate compression level under isobaric conditions (with a surface pressure greater than 11 mN m(-1)) compared to the PLGA, independent on the chemical structure of the diurethane moiety. The layer thicknesses of both OLGA-PU and PLGA films decrease in the high compression state with decreasing surface pressure, as deduced from ellipsometric data. All films must be described with the effective medium approximation as water swollen layers.
KW  - Brewster angle microscopy
KW  - Langmuir monolayer
KW  - poly[(rac-lactide)-co-glycolide]
KW  - polyesterurethanes
KW  - spectroscopic ellipsometry
Y1  - 2015
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38478
SN  - 1022-1336
SN  - 1521-3927
VL  - 36
IS  - 21
SP  - 1910
EP  - 1915
PB  - Wiley-VCH
CY  - Weinheim
ER  -