Effect of chemical modification of silica surface with metal oxides on the thermal properties of adsorbed polydimethylsiloxane
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Effect of chemical modification of silica surface with metal oxides on the thermal properties of adsorbed polydimethylsiloxane
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| Creator |
Borysenko, M.V.
Bogatyrov, V.M. Dyachenko, A.G. Pokrovskiy, V.A. |
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| Subject |
Surface chemistry of silica and related sorbents
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| Description |
Temperature programmed desorption mass spectrometry, thermogravimetry and differential thermal analysis were used to investigate the thermal destruction of adsorbed polydimethylsiloxane (PDMS) in air and vacuum conditions. Fumed silicas, whose surface contained grafted oxygen compounds of metals or phosphorus, were used as adsorbents. VOCl₃, CrO₂Cl₂, TiCl₄, SnCl₄, AlCl₃, PCl₃ and Zn(Acac)₂ vapors were applied as modifiers. It was found that in air the presence of metal oxides and phosphorus on silica surface lead to partial depolymerization of adsorbed PDMS. Degree of depolymerization ranges up to about 80% for V/SiO₂, P/SiO₂ and Al/SiO₂ samples containing 40% PDMS. The presence of metal oxides on silica surface decrease of starting temperatures of Si-C bond destruction in vacuum and result in elimination of methane at 140-550 and 550-850°С.
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| Date |
2017-11-20T18:16:27Z
2017-11-20T18:16:27Z 2002 |
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| Type |
Article
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| Identifier |
Effect of chemical modification of silica surface with metal oxides on the thermal properties of adsorbed polydimethylsiloxane / M.V. Borysenko, V.M. Bogatyrov, A.G. Dyachenko, V.A. Pokrovskiy // Поверхность. — 2002. — Вип. 7-8. — С. 11-18. — Бібліогр.: 10 назв. — англ.
XXXX-0106 http://dspace.nbuv.gov.ua/handle/123456789/126347 |
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| Language |
en
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| Relation |
Поверхность
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| Publisher |
Інститут хімії поверхні ім. О.О. Чуйка НАН України
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