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Polymerization of monomers initiated by silyl centers in SiO deposits prepared by pulsed laser ablation
Author(s) -
Dřínek Vladislav,
Vacek Karel,
Yuzhakov Gleb,
Brus Jiří
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24802
Subject(s) - monomer , styrene , polymerization , polymer chemistry , methyl methacrylate , electron paramagnetic resonance , materials science , ethylene glycol dimethacrylate , radical polymerization , copolymer , photochemistry , fourier transform infrared spectroscopy , silylation , chemistry , polymer , organic chemistry , nuclear magnetic resonance , chemical engineering , catalysis , methacrylic acid , physics , engineering , composite material
Deposits from silicon monoxide prepared by pulsed laser ablation were allowed to react with acrylic and vinyl monomers—styrene, methyl methacrylate and 1,2 ethylene glycol dimethacrylate. It was revealed by means of FTIR, electron paramagnetic resonance (EPR), and NMR spectroscopies that silyl Si· reacts with monomer molecules and initiates the consecutive polymerization. Crosslinking is proved by the occurrence of bending δ(CH 2 ) absorption peak at about 750 cm −1 in FTIR spectra. Because of very low concentration of the propagating radical for styrene we used a radical scavenger N ‐phenyl‐ t ‐butylnitrone for trapping. The measured EPR parameters were compared with the calculated ones. In case of styrene, NMR analysis manifested the presence of SiC bonds in SiC x O y ( x + y = 2) units, which can be taken as direct evidence of the reaction between silyl centers and monomer molecules. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4488–4492, 2006