caa a22 4500 467920257 CHVBK 20180406152915.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00706-006-0442-z doi (NATIONALLICENCE)springer-10.1007/s00706-006-0442-z Investigation of the Structure of Polymerizable Silsesquioxanes by GPC and MALDI-TOF-MS in Relation to their Viscosity [Elektronische Daten] [Simone Klapdohr, Norbert Moszner, Guido Kickelbick, Ralph-P. Krüger] Summary.: Hydrolytic condensation of different methacrylate groups containing alkoxy silanes yielded resins which showed interesting properties as a matrix for dental composites. For this purpose, resins of low viscosity are desired resulting in composites with a high amount of inorganic fillers. Our investigations demonstrated that the viscosity of the obtained polycondensates was predominantly influenced by the kind of organic spacer between the methacrylate group and the silicon atom. In addition, the viscosity also significantly changed in dependence of the kind of structure units built. NMR spectroscopic investigations as well as size exclusion chromatography (SEC) and matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry showed that the formed structures depended both on the kind of catalyst used for hydrolysis/condensation and the bulkiness of the organic substituent at the silicon atom. Springer-Verlag, 2006 Keywords. Nanostructure nationallicence Sols nationallicence Polycondensation nationallicence Silicon compounds nationallicence Dental nationallicence Klapdohr Simone Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein aut Moszner Norbert Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein aut Kickelbick Guido Vienna University of Technology, A-1060, Wien, Austria aut Krüger Ralph-P Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/5(2006-05-01), 667-679 0026-9247 137:5<667 2006 137 706 https://doi.org/10.1007/s00706-006-0442-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00706-006-0442-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Klapdohr Simone Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein aut NATIONALLICENCE 700 1- Moszner Norbert Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein aut NATIONALLICENCE 700 1- Kickelbick Guido Vienna University of Technology, A-1060, Wien, Austria aut NATIONALLICENCE 700 1- Krüger Ralph-P Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 137/5(2006-05-01), 667-679 0026-9247 137:5<667 2006 137 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer