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The initial stages of aminosilanol polymerisation
Samuel A French1, Alexey A Sokol, C Richard A Catlow
1DFRL, The Royal Institution of Great Britain, 21 Albemarle Street, London, UKW1S 4BS. sam@ri.ac.uk
Chemical Communications (Cambridge, England)
|January 23, 2004
Summary
Polysiloxane protective coatings require facile proton transfer for polymerization. (3-aminopropyl)trihydroxysilane shows self-catalysis due to its proton-accepting tail group, unlike thiolpropyltrihydroxysilane or isopropanol.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Chemistry
Background:
- Polysiloxanes are crucial for protective coatings.
- Facile proton transfer is essential for polysiloxane polymerization.
- Understanding initial polycondensation stages is key for optimizing coating properties.
Purpose of the Study:
- To investigate the initial stages of polysiloxane polycondensation.
- To compare the effects of different silanol tail groups on proton transfer.
- To evaluate the influence of solvents, specifically isopropanol, on the polymerization process.
Main Methods:
- Comparative analysis of silanol tail groups in polysiloxane precursors.
- Investigation of proton transfer dynamics during polycondensation.
- Solvent effect studies using isopropanol.
Main Results:
- The (3-aminopropyl)trihydroxysilane precursor demonstrated potential for self-catalysis.
- The amine tail group acted as a proton acceptor, facilitating polymerization.
- Thiolpropyltrihydroxysilane and isopropanol did not effectively promote proton transfer for polymerization.
Conclusions:
- Tail group chemistry significantly influences the proton transfer required for polysiloxane formation.
- (3-aminopropyl)trihydroxysilane offers a promising route for self-catalyzed polysiloxane coatings.
- Further research into tailored silanol precursors could optimize protective coating performance.