TY  - CHAP
A1  - Behl, Marc
A1  - Kratz, Karl
A1  - Nöchel, Ulrich
A1  - Sauter, Tilman
A1  - Lendlein, Andreas
T1  - Polymer networks capable of reversible shape-memory-effects
T2  - Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS
Y1  - 2014
SN  - 0065-7727
VL  - 248
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - INPR
A1  - Baudis, Stefan
A1  - Behl, Marc
A1  - Lendlein, Andreas
T1  - Smart polymers for biomedical applications
T2  - Macromolecular chemistry and physics
Y1  - 2014
U6  - https://doi.org/10.1002/macp.201400561
SN  - 1022-1352
SN  - 1521-3935
VL  - 215
IS  - 24
SP  - 2399
EP  - 2402
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Schmidt, Christian
A1  - Behl, Marc
A1  - Lendlein, Andreas
A1  - Beuermann, Sabine
T1  - Synthesis of high molecular weight polyglycolide in supercritical carbon dioxide
JF  - RSC Advances
N2  - Polyglycolide (PGA) is a biodegradable polymer with multiple applications in the medical sector. Here the synthesis of high molecular weight polyglycolide by ring-opening polymerization of diglycolide is reported. For the first time stabilizer free supercritical carbon dioxide (scCO(2)) was used as a reaction medium. scCO(2) allowed for a reduction in reaction temperature compared to conventional processes. Together with the lowering of monomer concentration and consequently reduced heat generation compared to bulk reactions thermal decomposition of the product occurring already during polymerization is strongly reduced. The reaction temperatures and pressures were varied between 120 and 150 degrees C and 145 to 1400 bar. Tin(II) ethyl hexanoate and 1-dodecanol were used as catalyst and initiator, respectively. The highest number average molecular weight of 31 200 g mol(-1) was obtained in 5 hours from polymerization at 120 degrees C and 530 bar. In all cases the products were obtained as a dry white powder. Remarkably, independent of molecular weight the melting temperatures were always at (219 +/- 2)degrees C.
Y1  - 2014
U6  - https://doi.org/10.1039/c4ra06815g
SN  - 2046-2069
VL  - 4
IS  - 66
SP  - 35099
EP  - 35105
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - GEN
A1  - Schmidt, Christian
A1  - Behl, Marc
A1  - Lendlein, Andreas
A1  - Bauermann, Sabine
T1  - Synthesis of high molecular weight polyglycolide in supercritical carbon dioxide
N2  - Polyglycolide (PGA) is a biodegradable polymer with multiple applications in the medical sector. Here the synthesis of high molecular weight polyglycolide by ring-opening polymerization of diglycolide is reported. For the first time stabilizer free supercritical carbon dioxide (scCO2) was used as a reaction medium. scCO2 allowed for a reduction in reaction temperature compared to conventional processes. Together with the lowering of monomer concentration and consequently reduced heat generation compared to bulk reactions thermal decomposition of the product occurring already during polymerization is strongly reduced. The reaction temperatures and pressures were varied between 120 and 150 °C and 145 to 1400 bar. Tin(II) ethyl hexanoate and 1-dodecanol were used as catalyst and initiator, respectively. The highest number average molecular weight of 31 200 g mol−1 was obtained in 5 hours from polymerization at 120 °C and 530 bar. In all cases the products were obtained as a dry white powder. Remarkably, independent of molecular weight the melting temperatures were always at (219 ± 2) °C.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 284 
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-99439
ER  -