Polymerace monomerů iniciovaná silylovými centry v SiO depozitech připravených pulsní laserovou ablací

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Polymerization of Monomers Initiated by Silyl Centers in SiO Deposits Prepared by Pulsed Laser Ablation

Popis výsledku v původním jazyce

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 (CH2) 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 bondsin SiCxOy (x + y = 2) units, which can be taken as direct evidence of the reaction between silyl centers and monomer molecules.

Název v anglickém jazyce

Polymerization of Monomers Initiated by Silyl Centers in SiO Deposits Prepared by Pulsed Laser Ablation

Popis výsledku anglicky

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 (CH2) 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 bondsin SiCxOy (x + y = 2) units, which can be taken as direct evidence of the reaction between silyl centers and monomer molecules.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

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Svazek periodika

102

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

4488-4492

Kód UT WoS článku

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EID výsledku v databázi Scopus

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