14184
2009
2009
eng
article
1
--
--
--
Influence of ionic liquid structure on the propagation kinetics of methyl methacrylate
http://pubs.acs.org/journal/mamobx
10.1021/ma900774e
0024-9297
allegro:1991-2014
10106631
Macromolecules. - ISSN 0024-9297. - 42 (2009), 14, S. 5062 - 5072
Aleksandra Jelicic
Nuria Garcia
Sabine Beuermann
Institut für Chemie
Referiert
31474
2010
2010
eng
article
1
--
--
--
Individual rate coefficients for 1H,1H,2H,2H-tridecafluorooctyl methacrylate radical polymerizations
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.
http://pubs.acs.org/journal/mamobx
10.1021/Ma902653b
0024-9297
allegro:1991-2014
10107781
Macromolecules. - ISSN 0024-9297. - 43 (2010), 8, S. 3699 - 3704
Rebekka Siegmann
Sabine Beuermann
Institut für Chemie
Referiert
31539
2010
2010
eng
article
1
--
--
--
Functionalization of carbon black nanoparticles with poly(vinylidene fluoride)
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.
http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%291542-9369
10.1002/Pola.24277
0887-624X
allegro:1991-2014
10107860
Journal of polymer science A : Polymer chemistry. - ISSN 0887-624X. - 48 (2010), 21, S. 4847 - 4854
Radovan Vukicevic
Peter Hierzenberger
Sabine Hild
Sabine Beuermann
Institut für Chemie
Referiert
30081
2009
2009
eng
article
1
--
--
--
Prediction of the ionic liquid influence on propagation rate coefficients in methyl methacrylate radical polymerizations based on Kamlet-Taft solvatochromic parameters
http://pubs.acs.org/journal/mamobx?cookieSet=1
10.1021/ma9017907
0024-9297
allegro:1991-2014
10106630
Macromolecules. - ISSN 0024-9297. - 42 (2009), 22, S. 8801 - 8808
Aleksandra Jelicic
Nuria Garcia
Hans-Gerd Löhmannsröben
Sabine Beuermann
Institut für Chemie
Referiert
31595
2009
2009
eng
article
1
--
--
--
Effect of polymer properties on poly(vinylidene fluoride) particles produced by rapid expansion of CO2 + polymer mixtures
The generation of nanoscale primary poly(vinylidene fluoride) (PVDF) particles by rapid expansion of supercritical solutions (RESS) is reported. The experimental results show that RESS enables the formation of PVDF particles with median particle diameters ranging from 56 to 226 nm and that the size of PVDF particles can be influenced by polymer properties. The particle size can be decreased either by increasing molar mass, in case of identical polymer end groups, or by increasing the degree of crystallinity, in case of similar molar mass and different end groups.
http://www.sciencedirect.com/science/journal/08968446
10.1016/j.supflu.2008.09.016
0896-8446
allegro:1991-2014
10107922
Journal of supercritical fluids. - ISSN 0896-8446. - 48 (2009), 1, S. 48 - 55
Eugenia Breininger
Muhammad Imran-ul-haq
Michael Tuerk
Sabine Beuermann
Institut für Chemie
Referiert
31581
2009
2009
eng
article
1
--
--
--
Solvent influence on propagation kinetics in radical polymerizations studied by pulsed laser initiated polymerizations
The influence of the reaction medium (organic solvents, water, ionic liquids, supercritical CO2) on the propagation rate in radical polymerizations has very different causes, e.g., hindered rotational modes, hydrogen bonding or electron pair donor/acceptor interactions. Depending on the origin of the solvent influence propagation rate coefficients, k(P), may be enhanced by up to an order of magnitude associated with changes in the pre-exponential or the activation energy of k(P). In contrast, non-specific interactions, size and steric effects lead to rather small changes in the vicinity of the radical chain end and are reflected by modest variations in k(P).
http://www3.interscience.wiley.com/cgi-bin/jhome/10003270
10.1002/marc.200900131
1022-1336
allegro:1991-2014
10107905
Macromolecular rapid communications. - ISSN 1022-1336. - 30 (2009), 13, S. 1066 - 1088
Sabine Beuermann
Institut für Chemie
Referiert
30846
2009
2009
eng
article
1
--
--
--
Solvent influence on propagation kinetics in radical polymerizations studied by pulsed laser initiated polymerizations
The influence of the reaction medium (organic solvents, water, ionic liquids, supercritical CO2) on the propagation rate in radical polymerizations has very different causes, e.g., hindered rotational modes, hydrogen bonding, or electron pair donor / acceptor interactions. Depending on the origin of the solvent influence propagation rate coefficients, kp, may be enhanced by up to an order of magnitude associated with changes in the pre-exponential or the activation energy of kp. Contrary, non-specific interactions, size and steric effects lead to rather small changes in the vicinity of the radical chain end and are reflected by modest variations in kp.
http://www3.interscience.wiley.com/journal/117932056/issueyeargroup?year=2009
1022-1336
allegro:1991-2014
10106623
Macromolecular rapid communications. - ISSN 1022-1336. - 30 (2009), 13, S. 1066 - 1088
Sabine Beuermann
Institut für Chemie
Referiert
36798
2011
2011
eng
232
242
11
5-6
5
article
Wiley-Blackwell
Malden
1
--
--
--
Toward the description and prediction of solvent induced variations in Methacrylate Propagation Rate Coefficients on the basis of Solvatochromic Parameters
Benzyl methacrylate (BzMA) propagation rate coefficients, k(p), were determined in ionic liquids and common organic solvents via pulsed-laser polymerizations with subsequent polymer analysis by size-exclusion chromatography (PLP-SEC). The aim of the work is to gain a deeper understanding of the solvent influence on k(p) and to develop a general correlation between solvent-induced variations in k(p) and solvent properties. Applying a linear solvation energy relationship (LSER), which correlates k(p) to solvent solvatochromic parameters, suggests that dipolarity/polarizability determines the solvent influence on k(p). To compare the solvent influence on BzMA k(p) with data for methyl methacrylate, hydroxypropyl methacrylate, and 2-ethoxyethyl methacrylate normalized k(p) data were treated by a single LSER, providing a universal treatment of the solvent influence on the propagation kinetics of the four monomers. Further, the predictive capabilities of this universal correlation were tested with additional monomers from the methacrylate family.
Macromolecular reaction engineering
10.1002/mren.201000058
1862-832X
wos:2011-2013
WOS:000291112300004
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
University of Potsdam in the framework of the Graduate School on Green
Chemistry; EU; state of Brandenburg
Aleksandra Jelicic
Muttaqin Yasin
Sabine Beuermann
eng
uncontrolled
ionic liquid
eng
uncontrolled
kinetics (polym.)
eng
uncontrolled
radical polymerization
eng
uncontrolled
solvent influence
Institut für Chemie
Referiert
36809
2011
2011
eng
2319
2326
8
6
12
article
American Chemical Society
Washington
1
--
--
--
Free Radical Copolymerization Kinetics of gamma-Methyl-alpha-methylene-gamma-butyrolactone (MeMBL)
The propagation kinetics and copolymerization behavior of the biorenewable monomer gamma-methyl-alpha-methylene-gamma-butyrolactone (MeMBL) are studied using the Pulsed laser polymerization (PLP)/size exclusion chromatography (SEC) technique. The propagation rate coefficent for MeMBL is 15% higher than that of its structural analogue, methyl methacrylate (MMA), with a similar activation energy of 21.8 kJ . mol(-1). When compared to MMA, MeMBL is preferentially incorporated into copolymers when reacted with styrene (ST), MMA, and n-butyl acrylate (BA); the monomer reactivity ratios fit from bulk MeMBL/ST, MeMBL/MMA, and MeMBL/BA copolymerizations are r(MeMBL) = 0.80 +/- 0.04 and r(ST) = 0.34 +/- 0.04, r(MeMBL), = 3.0 +/- 0.3 and r(MMA) = 0.33 +/- 0.01, and r(MeMBL) = 7.0 +/- 2.0 and r(BA) = 0.16 +/- 0.03, respectively. In all cases, no significant variation with temperature was found between 50 and 90 degrees C. The implicit penultimate unit effect (IPUE) model was found to adequately fit the composition-averaged copolymerization propagation rate coefficient, k(p,cop), for the three systems.
Biomacromolecules : an interdisciplinary journal focused at the interface of polymer science and the biological sciences
10.1021/bm200400s
1525-7797
wos:2011-2013
WOS:000291499900043
Hutchinson, RA (reprint author), Queens Univ, Dept Chem Engn, Dupuis Hall, Kingston, ON K7L 3N6, Canada., robin.hutchinson@chee.queensu.ca
Natural Sciences and Engineering Research Council of Canada; European
Union; state of Brandenburg
Robert A. Cockburn
Rebekka Siegmann
Kevin A. Payne
Sabine Beuermann
Timothy F. L. McKenna
Robin A. Hutchinson
Institut für Chemie
Referiert
35757
2012
2012
eng
1208
1213
6
14
33
article
Wiley-VCH
Weinheim
1
--
--
--
Propagation rate coefficients for homogeneous phase VDF-HFP copolymerization in supercritical CO2
For the first time, propagation rate coefficients, kp,COPO, for the copolymerizations of vinylidene fluoride and hexafluoropropene have been determined. The kinetic data was determined via pulsed-laser polymerization in conjunction with polymer analysis via size-exclusion chromatography, the PLP-SEC technique. The experiments were carried out in homogeneous phase with supercritical CO2 as solvent for temperatures ranging from 45 to 90 degrees C. Absolute polymer molecular weights were calculated on the basis of experimentally determined MarkHouwink constants. The Arrhenius parameters of kp,COPO vary significantly compared with ethene, which is explained by the high electronegativity of fluorine and less intra- and intermolecular interactions between the partially fluorinated macroradicals.
Macromolecular rapid communications
10.1002/marc.201200115
1022-1336
wos:2011-2013
WOS:000306403900008
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
Dyneon GmbH; Deutsche Forschungsgemeinschaft (DFG) [BE2032/2-1]; EU;
state of Brandenburg within the Hochschulinvestitionsprogramm
Rebekka Siegmann
Eleonore Möller
Sabine Beuermann
eng
uncontrolled
copolymerization
eng
uncontrolled
fluorinated olefins
eng
uncontrolled
kinetics (polym)
eng
uncontrolled
pulse laser initiated polymerization
eng
uncontrolled
radical polymerization
Institut für Chemie
Referiert
36293
2012
2012
eng
2261
2265
5
8
3
article
Royal Society of Chemistry
Cambridge
1
--
--
--
Poly(vinylidene fluoride)-functionalized single-walled carbon nanotubes for the preparation of composites with improved conductivity
The surface of single-walled carbon nanotubes (SWCNTs) was functionalized with azide-terminated poly(vinylidene fluoride) (PVDF). Functionalization was confirmed by dispersibility, Raman spectroscopy, and thermogravimetric analyses. Raman spectra show disordering of the SWCNTs, thus, strongly suggesting that PVDF was covalently attached to SWCNTs. Functionalized SWCNTs were mixed with commercially available PVDF in a twin-screw extruder and thin films were obtained by melt-pressing. Films containing 0.5 and 1 wt% PVDF-functionalized SWCNTs exhibited significantly improved electrical conductivity compared to PVDF films containing pristine SWCNTs.
Polymer Chemistry
10.1039/c2py20166f
1759-9954
wos:2011-2013
WOS:000305964400042
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
University of Potsdam
Radovan Vukicevic
Ivana Vukovic
Hristiyan Stoyanov
Andreas Korwitz
Doris Pospiech
Guggi Kofod
Katja Loos
Gerrit ten Brinke
Sabine Beuermann
Institut für Chemie
Referiert
36898
2011
2011
eng
2597
2603
7
8
44
article
American Chemical Society
Washington
1
--
--
--
Fullerenes decorated with poly(vinylidene fluoride)
Fullerenes decorated with poly(vinylidene fluoride) (PVDF) were synthesized in a three-step procedure: Iodine transfer polymerization of vinylidene fluoride with C(6)F(12)I(2) as the chain transfer agent was carried out in supercritical carbon dioxide to synthesize iodine-terminated PVDF, which was subsequently transformed to azide-terminated polymer. Finally, azide-terminated PVDF chains were attached to a fullerene core under microwave irradiation at 160 degrees C in 1.5 h. The materials were characterized by NMR, FT-IR, UV/vis, GPC, elemental analysis, and DSC. On average, 4-5 PVDF chains are attached to one C(60) moiety. FT-IR spectra and DSC measurements indicate that the polymer end groups strongly affect the crystallinity of the material. For PVDF with azide end groups and PVDF attached to fullerenes the fraction of the beta polymorph is dominant while alpha polymorphs are almost absent.
Macromolecules : a publication of the American Chemical Society
10.1021/ma102754c
0024-9297
wos:2011-2013
WOS:000289593200027
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
University of Potsdam in the framework of Potsdam Graduate School on
Green Chemistry
Radovan Vukicevic
Sabine Beuermann
Institut für Chemie
Referiert
36673
2011
2011
eng
1
16
242
conferenceobject
American Chemical Society
Washington
1
--
--
--
Azide-terminated poly(vinylidene fluoride) as building block for nanocomposite materials and block copolymers
Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS
0065-7727
wos:2011-2013
242nd National Meeting of the American-Chemical-Society (ACS)
AUG 28-SEP 01, 2011
WOS:000299378307266
Denver, CO
sabine.beuermann@uni-potsdam.de
Radovan Vukicevic
Ulrike Schreiber
Sabine Beuermann
Institut für Chemie
Referiert
36672
2011
2011
eng
1
242
conferenceobject
American Chemical Society
Washington
1
--
--
--
Block copolymers of poly(vinylidene fluoride) obtained via 1,3 dipolar cycloaddition
Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS
0065-7727
wos:2011-2013
242nd National Meeting of the American-Chemical-Society (ACS)
AUG 28-SEP 01, 2011
WOS:000299378306892
Denver, CO
ulrike.schreiber@uni-potsdam.de
Ulrike Schreiber
Radovan Vukicevic
Sabine Beuermann
Institut für Chemie
Referiert
36194
2012
2012
eng
19
28
10
1
213
article
Wiley-Blackwell
Malden
1
--
--
--
Investigations into chain-length-dependent termination in bulk radical polymerization of 1H, 1H, 2H, 2H-Tridecafluorooctyl methacrylate
The SP-PLP-EPR technique is used to carry out a detailed investigation of the radical termination kinetics of 1H, 1H, 2H, 2H-tridecafluorooctyl methacrylate (TDFOMA) in bulk at relatively low conversion. Composite-model behavior for chain-length-dependent termination rate coefficients, kti,i, is observed. It is found that for TDFOMA, ic approximate to 60 independent of temperature, and as approximate to 0.65 and al approximate to 0.2 at 80 degrees C and above. However, at lower temperatures the situation is strikingly different, with the significantly higher average values of as = 0.89 +/- 0.15 and al = 0.32 +/- 0.10 being obtained at 50 degrees C and below. This makes TDFOMA the first monomer to be found that exhibits clearly different exponent values, as and al, at lower and higher temperature, and that has both a high as, like an acrylate, and a high ic, like a methacrylate.
Macromolecular chemistry and physics
10.1002/macp.201100479
1022-1352
wos:2011-2013
WOS:000298743700003
Buback, M (reprint author), Univ Gottingen, Inst Phys Chem, Tammannstr 6, D-37077 Gottingen, Germany., mbuback@gwdg.de
Fonds der Chemischen Industrie
Johannes Barth
Rebekka Siegmann
Sabine Beuermann
Gregory T. Russell
Michael Buback
eng
uncontrolled
ESR
eng
uncontrolled
EPR
eng
uncontrolled
kinetics (polym
eng
uncontrolled
)
eng
uncontrolled
methacrylates
eng
uncontrolled
radical polymerization
eng
uncontrolled
termination
Institut für Chemie
Referiert
36385
2012
2012
eng
409
414
6
2
3
article
Royal Society of Chemistry
Cambridge
1
--
--
--
Alkyne-azide coupling of tailored poly(vinylidene fluoride) and polystyrene for the synthesis of block copolymers
The synthesis of block copolymers consisting of poly(vinylidene fluoride) (PVDF) and polystyrene (PS) is reported. Firstly, a propargyl-functionalized alkoxyamine initiator (PgOTIPNO) was prepared and subsequently used for the preparation of a propargyl-terminated PS homopolymer of different chain lengths with low dispersities via nitroxide-mediated radical polymerization. A tailored PVDF homopolymer with iodine end groups originating from iodine transfer polymerization was transformed to PVDF with azide end group. Then, alkyne-terminated PS with different molecular weights and azide-terminated PVDF were joined together via copper-catalyzed alkyne-azide coupling. The block copolymers were characterized using H-1-NMR, F-19-NMR, IR, SEC, and DSC.
Polymer Chemistry
10.1039/c1py00427a
1759-9954
wos:2011-2013
WOS:000298991200023
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
University of Potsdam
Radovan Vukicevic
Ulrike Schwadtke
Simon Schmuecker
Philipp Schaefer
Dirk Kuckling
Sabine Beuermann
Institut für Chemie
Referiert
37080
2011
2011
eng
8
21
14
1
5
article
Wiley-VCH
Weinheim
1
--
--
--
Homogeneous phase copolymerizations of vinylidene fluoride and hexafluoropropene in supercritical carbon dioxide
Copolymerizations of vinylidene fluoride (VDF) and hexafluoropropene (HFP) were carried out in homogeneous phase with supercritical carbon dioxide up to complete VDF conversion using conventional peroxide initiators. The HFP monomer feed ratios, f(HFP), were varied between 0.65 and 0.20. Depending on f(HFP) amorphous or semi-crystalline copolymers were obtained. f(HFP) also determines the minimum pressure required to allow for homogeneous phase reactions. For example, HFP-rich copolymerizations in 70 wt.-% CO(2) at 100 degrees C require a pressure of around 500 bar. Further, bulk copolymerizations in homogenous phase were feasible for f(HFP) 0.65 at 900 bar up to complete VDF conversion. Copolymerizations in the presence of perfluorinated hexyl iodide carried out at 75 degrees C gave access to low dispersity polymers. Due to homogeneous phase conditions the use of any surfactants or fluorinated cosolvent is avoided.
Macromolecular reaction engineering
10.1002/mren.201000031
1862-832X
wos:2011-2013
WOS:000285934300002
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
Deutsche Forschungsgemeinschaft [BE-2033/2-1]; Dyneon GmbH; EU; state of
Brandenburg
Eleonore Möller
Sabine Beuermann
eng
uncontrolled
copolymerization
eng
uncontrolled
hexafluoropropene
eng
uncontrolled
phase behavior
eng
uncontrolled
supercritical CO(2)
eng
uncontrolled
vinylidene fluoride
Institut für Chemie
Referiert
37071
2011
2011
eng
168
179
12
2
212
article
Wiley-VCH
Weinheim
1
--
--
--
1H,1H,2H,2H-Perfluorodecyl-Acrylate-Containing block copolymers from ARGET ATRP
Block copolymers of 1H,1H,2H,2H-perfluorodecyl acrylate (AC8) were obtained from ARGET ATRP. To obtain block copolymers of low dispersity the PAC8 block was synthesized in anisole with a CuBr(2)/PMDETA catalyst in the presence of tin(II) 2-ethylhexanoate as a reducing agent. The PAC8 block was subsequently used as macroinitiator for copolymerization with butyl and tert-butyl acrylate carried out in scCO(2). To achieve catalyst solubility in CO(2) two fluorinated ligands were employed. The formation of block copolymers was confirmed by size exclusion chromatography and DSC.
Macromolecular chemistry and physics
10.1002/macp.201000307
1022-1352
wos:2011-2013
WOS:000287056700007
Beuermann, S (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany., sabine.beuermann@uni-potsdam.de
Ulrike Schreiber
Benjamin Hosemann
Sabine Beuermann
eng
uncontrolled
atom transfer radical polymerization (ATRP)
eng
uncontrolled
block copolymers
eng
uncontrolled
fluoropolymers
eng
uncontrolled
supercritical carbon dioxide
Institut für Chemie
Referiert
38235
2014
2014
eng
35099
35105
7
66
4
article
Royal Society of Chemistry
Cambridge
1
--
--
--
Synthesis of high molecular weight polyglycolide in supercritical carbon dioxide
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.
RSC Advances
10.1039/c4ra06815g
2046-2069
wos:2014
WOS:000341287700048
Schmidt, C (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.
Christian Schmidt
Marc Behl
Andreas Lendlein
Sabine Beuermann
Institut für Chemie
Referiert
11956
2010
2010
eng
article
1
--
--
--
Transparent, flexible, and paramagnetic ionogels based on PMMA and the iron-based ionic liquid 1-butyl-3- methylimidazolium tetrachloroferrate(III) [Bmim][FeCl4]
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.
http://www.rsc.org/Publishing/Journals/jm/index.asp
10.1039/C0jm01733g
0959-9428
allegro:1991-2014
10107725
Journal of materials chemistry. - ISSN 0959-9428. - 20 (2010), 42, S. 9543-9549
Zai-Lai Xie
Aleksandra Jelicic
Feipeng Wang
Pierre Rabu
Alwin Friedrich
Sabine Beuermann
Andreas Taubert
Institut für Chemie
Referiert