TY  - JOUR
A1  - Izraylit, Victor
A1  - Liu, Yue
A1  - Tarazona, Natalia A.
A1  - Machatschek, Rainhard Gabriel
A1  - Lendlein, Andreas
T1  - Crystallization and degradation behaviour of multiblock copolyester blends in Langmuir monolayers
JF  - MRS communications / a publication of the Materials Research Society
N2  - Supporting the wound healing of soft tissues requires fixation devices becoming more elastic while degrading. To address this unmet need, we designed a blend of degradable multiblock copolymers, which is cross-linked by PLA stereocomplexation combining two soft segments differing substantially in their hydrolytic degradation rate. The degradation path and concomitant structural changes are predicted by Langmuir monolayer technique. The fast hydrolysis of one soft segment leads to a decrease of the total polymer mass at constant physical cross-linking density. The corresponding increase of the average spacing between the network nodes suggests the targeted increase of the blend's flexibility.
KW  - Degradable
KW  - In situ
KW  - Microstructure
KW  - Thin film
Y1  - 2021
U6  - https://doi.org/10.1557/s43579-021-00107-y
SN  - 2159-6859
SN  - 2159-6867
VL  - 11
IS  - 6
SP  - 850
EP  - 855
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Stegemann, Robert
A1  - Cabeza, Sandra
A1  - Pelkner, Matthias
A1  - Lyamkin, Viktor
A1  - Pittner, Andreas
A1  - Werner, Daniel
A1  - Wimpory, Robert
A1  - Boin, Mirko
A1  - Kreutzbruck, Marc
A1  - Bruno, Giovanni
T1  - Influence of the microstructure on magnetic stray fields of low-carbon steel welds
JF  - Journal of Nondestructive Evaluation
N2  - This study examines the relationship between the magnetic mesostructure with the microstructure of low carbon steel tungsten inert gas welds. Optical microscopy revealed variation in the microstructure of the parent material, in the heat affected and fusion zones, correlating with distinctive changes in the local magnetic stray fields measured with high spatial resolution giant magneto resistance sensors. In the vicinity of the heat affected zone high residual stresses were found using neutron diffraction. Notably, the gradients of von Mises stress and triaxial magnetic stray field modulus follow the same tendency transverse to the weld. In contrast, micro-X-ray fluorescence characterization indicated that local changes in element composition had no independent effect on magnetic stray fields.
KW  - TIG-welding
KW  - GMR sensors
KW  - Magnetic stray field
KW  - Neutron diffraction
KW  - Residual stress
KW  - Microstructure
KW  - Low carbon steel
Y1  - 2018
U6  - https://doi.org/10.1007/s10921-018-0522-0
SN  - 0195-9298
SN  - 1573-4862
VL  - 37
IS  - 3
PB  - Springer
CY  - New York
ER  -