TY  - JOUR
A1  - Siegmann, Rebekka
A1  - Beuermann, Sabine
T1  - Individual rate coefficients for 1H,1H,2H,2H-tridecafluorooctyl methacrylate radical polymerizations
N2  - Kinetic data for radical polymerizations of 1H,1H,2H,2H-tridecafluorooctyl methacrylate (TDFOMA) in bulk is reported. Pulsed laser initiated polymerizations yield propagation rate coefficients, k(p), which are by a factor of 1.9 higher than methyl methacrylate k(p). The activation energy of TDFOMA k(p) is not significantly different from that of alkyl methacrylates. Chain-length averaged termination rate coefficients were estimated from chemically initiated polymerizations with in-line FT-NIR spectroscopic monitoring of monomer conversion. Up to 30% of monomer conversion TDFOMA termination rate coefficients are only slightly below MMA low conversion values. The result is suggested to be due to less interactions between the macroradicals compared to nonfluorinated systems.
Y1  - 2010
UR  - http://pubs.acs.org/journal/mamobx
U6  - https://doi.org/10.1021/Ma902653b
SN  - 0024-9297
ER  - 
TY  - JOUR
A1  - Vukicevic, Radovan
A1  - Hierzenberger, Peter
A1  - Hild, Sabine
A1  - Beuermann, Sabine
T1  - Functionalization of carbon black nanoparticles with poly(vinylidene fluoride)
N2  - The surface of carbon black (CB) nanoparticles was functionalized with poly(vinylidene fluoride) (PVDF) either by trapping of macroradicals or by cycloaddition. PVDF with two iodine end groups (I-PVDF-I) obtained from iodine transfer polymerization in supercritical CO2 was heated in the presence of CB and the C-I bond was cleaved resulting in a reaction between the macroradical and the CB surface. To allow for cycloaddition of PVDF to the CB surface for a number of polymers, the iodine end groups were replaced by azide end groups. In addition, microwave irradiation was applied to the functionalization. The influence of temperature, time, polymer concentration, and polymer molar mass on the functionalization reaction was examined.
Y1  - 2010
UR  - http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291542-9369
U6  - https://doi.org/10.1002/Pola.24277
SN  - 0887-624X
ER  - 
TY  - JOUR
A1  - Xie, Zai-Lai
A1  - Jelicic, Aleksandra
A1  - Wang, Feipeng
A1  - Rabu, Pierre
A1  - Friedrich, Alwin
A1  - Beuermann, Sabine
A1  - Taubert, Andreas
T1  - Transparent, flexible, and paramagnetic ionogels based on PMMA and the iron-based ionic liquid 1-butyl-3- methylimidazolium tetrachloroferrate(III) [Bmim][FeCl4]
N2  - The iron-containing ionic liquid (IL) 1-butyl-3-methylimidazolium tetrachloroferrate(III) [Bmim][FeCl4] has been used as a building block in the synthesis of transparent, ion-conducting, and paramagnetic ionogels. UV/Vis spectroscopy shows that the coordination around the Fe(III) ion does slightly change upon incorporation of the IL into PMMA. The thermal stability of the PMMA increases significantly with IL incorporation. In particular, the onset weight loss observed at ca. 265 degrees C for pure PMMA is completely suppressed. The ionic conductivity shows a strong temperature dependence and increases with increasing IL weight fractions. The magnetic properties are similar to those reported for the pure IL and are not affected by the incorporation into the PMMA matrix. The resulting ionogel is thus an interesting prototype for soft, flexible, and transparent materials combining the mechanical properties of the matrix with the functionality of the metal-containing IL, such as magnetism.
Y1  - 2010
UR  - http://www.rsc.org/Publishing/Journals/jm/index.asp
U6  - https://doi.org/10.1039/C0jm01733g
SN  - 0959-9428
ER  -