Koch, Karin, Geller, Sven, Acar, Kubilay, Bach, Patricia, Tsarenko, Ekaterina and Schmidt, Annette ORCID: 0000-0002-7284-7847 (2020). Creation of a PDMS Polymer Brush on SiO2-Based Nanoparticles by Surface-Initiated Ring-Opening Polymerization. Polymers, 12 (4). BASEL: MDPI. ISSN 2073-4360

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Abstract

The incorporation of nanoparticles into soft matrices opens a broad spectrum of novel property combinations. However, one of the major challenges for these systems remains the compatibilization of particles with the surrounding matrix by proper surface functionalization. For silicon-based systems or liquid crystalline phases, polydimethylsiloxane (PDMS) brushes at the surface of particles increase the stability against particle agglomeration in such systems. Here, we report a novel approach for the functionalization of particles with a polysiloxane brush by surface-initiated ring-opening polymerization of a cyclosiloxane. For this purpose, surface hydroxy groups of silica and silica-coated hematite particles are used as initiators in combination with phosphazene bases as catalysts. The ring-chain equilibrium of a model-based solution polymerization is investigated in detail to find the appropriate reaction parameters. The corresponding molar masses are determined and compared by H-1-NMR and SEC measurements to confirm the underlying mechanism. In the resulting hybrid nanostructures, a covalently bound PDMS fraction is achieved up to 47 mass %.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Koch, KarinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Geller, SvenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Acar, KubilayUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bach, PatriciaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tsarenko, EkaterinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmidt, AnnetteUNSPECIFIEDorcid.org/0000-0002-7284-7847UNSPECIFIED
URN: urn:nbn:de:hbz:38-338287
DOI: 10.3390/polym12040787
Journal or Publication Title: Polymers
Volume: 12
Number: 4
Date: 2020
Publisher: MDPI
Place of Publication: BASEL
ISSN: 2073-4360
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
TRANSFER RADICAL POLYMERIZATION; CATIONIC-POLYMERIZATION; EPSILON-CAPROLACTONE; COBALT FERRITE; SILICA SPHERES; L-LACTIDE; POLY(DIMETHYLSILOXANE); KINETICS; POLYDIMETHYLSILOXANE; CYCLOTRISILOXANESMultiple languages
Polymer ScienceMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33828

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