Dehydrocondensation and hydrosilylation reactions of methylhydridesiloxane with allyl alcohol

The reaction of dehydrocondensation of f , y -bis(trimethylsiloxy)methylhydridesiloxane (n , 53) with allyl alcohol at various ratios of initial compounds, in the presence of anhydrous powders like caustic potassium and platinum chlorohydric acid has been investigated. It was established that in the...

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Bibliographic Details
Published in:International journal of polymeric materials 2003-01, Vol.52 (10), p.861-876
Main Authors: Mukbaniani, O., Gurgenidze, G., Khananashvili, L., Meladze, S.
Format: Article
Language:English
Subjects:
Applied sciences
Dehydrocondensation
Exact sciences and technology
Hydrosilylation
Inorganic and organomineral polymers
Methylhydridesiloxane
Physicochemistry of polymers
Properties and characterization
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Summary:The reaction of dehydrocondensation of f , y -bis(trimethylsiloxy)methylhydridesiloxane (n , 53) with allyl alcohol at various ratios of initial compounds, in the presence of anhydrous powders like caustic potassium and platinum chlorohydric acid has been investigated. It was established that in the presence of caustic potassium dehydrocondensation reaction takes place and methylsiloxane oligomers with allylic groups in side chain have been obtained. In the presence of platinum chlorohydric acid competetive dehydrocondensation and hydrosilylation reactions take place with formation of oligomers with various chain links. In late stages of the reaction three-dimensional systems were obtained. During dehydrocondensation the reaction order, reaction rate constants and activation energy were found. The structure of the synthesized oligomers were determined by IR and NMR spectra data. Gel permeation chromatography, differential scanning calorimetric and X-ray analysis of the synthesized oligomers were carried out.
ISSN:0091-4037
1563-535X
DOI:10.1080/713743644