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Silicone Nano/Microstructures Obtained in Ionic Polymerization
Author(s) -
Kuźmicz Danuta,
Kępczyński Mariusz,
Bednar Jan,
Mistrikova Veronika,
Jachimska Barbara,
Nowakowska Maria
Publication year - 2011
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201151007
Subject(s) - monomer , polymerization , materials science , silicone , polymer chemistry , dynamic light scattering , polymer , hydrosilylation , silicone oil , transmission electron microscopy , cationic polymerization , microstructure , sonication , chemical engineering , catalysis , nanoparticle , organic chemistry , chemistry , composite material , nanotechnology , engineering
Summary: This work presents a novel surfactant‐free method of preparation of silicone hollow nano/microstructures in water. New silicone monomer was synthesized by attaching the unsaturated fatty acid ester – methyl 10‐undecenoate (UDM) to the commercial silicone monomer ‐ 1,3,5,7‐tetramethylcyclotetrasiloxane (D 4 H ) using hydrosilylation reaction. The reaction was catalyzed by Karstedt's catalyst [Pt(0)‐divinyltetramethyldisiloxane complex]. That modified monomer, tetra(11‐methoxy‐11‐oxoundecyl)‐tetramethylcyclotetrasiloxane (D 4 undecyl ), undergoes self‐organization in water. The anionic ring‐opening polymerization of D 4 undecylresulted in formation of the silicone polymer (poly‐D 4 undecyl ). Both, the silicone monomer and the polymer were dispersed in aqueous medium using sonication. The structures in the dispersions were visualized by cryo‐transmission electron microscopy (Cryo‐TEM) and optical microscopy. The size of the particles was also determined from dynamic light scattering (DLS) measurements.