The adhesion promotion mechanism of organofunctional silanes

Harding, P. H.; Berg, John C.

doi:10.1002/(sici)1097-4628(19980207)67:6<1025::aid-app9>3.0.co;2-k

Cited by 49 publications

(22 citation statements)

References 4 publications

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“…The research reported here deals with the improvement of the mechanical characteristics of aged papers with simultaneous deacidification. It has been observed that the introduction of aminoalkylalkoxysilanes (AAAS) in a cellulose fibre web gives new desirable properties to aged or unaged papers 1–4. The experimental procedure used solutions of AAAS in ethanol, and the new properties were thought to arise from the formation of a self‐developing polysiloxane network on the fibre surfaces within the paper.…”

Section: Introductionmentioning

confidence: 99%

Condensation of alkoxysilanes in alcoholic media: II. Oligomerization of aminopropylmethyldiethoxysilane and co‐oligomerization with dimethyldiethoxysilane

Bennevault‐Celton¹,

Maciejak²,

Desmazières

et al. 2010

Polymer International

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In the context of the preservation of cultural heritage, the treatment of paper by an aminoalkylalkoxysilane, or its mixture with dimethyldiethoxysilane (DMDES), gave encouraging results. The condensation experiments presented here, carried out in alcohol medium using aminopropylmethyldiethoxysilane (AMDES) alone or with DMDES, were followed using 1 H NMR, 29 Si NMR and matrix-assisted laser desorption ionization time-of-flight (MALDI TOF) spectroscopies. The aim was to determine whether DMDES and AMDES could copolymerize under the conditions used. An exchange reaction was observed for AMDES in ethanol in the absence of water, under conditions where no exchange took place for DMDES. In methanol, this reaction proceeded much more rapidly and the reactivity of methoxysilyl groups was higher than that of ethoxysilyl groups. In the same solvent, in the presence of water, hydrolysis, cyclization and oligomerization were observed using NMR and MALDI TOF spectroscopies. In ethanol, a kinetic study of a mixture of DMDES and AMDES showed that the condensation of the two monomers proceeded at comparables rates and MALDI-TOF analysis gave evidence that mixed oligomers were produced, containing from one to four AMDES units. It was concluded that the co-oligomerization did not lead to a mixture of homo-oligomers, which would be due to different hydrolysis and condensation kinetics, but induced the formation of co-oligomers.

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Section: Introductionmentioning

confidence: 99%

Condensation of alkoxysilanes in alcoholic media: II. Oligomerization of aminopropylmethyldiethoxysilane and co‐oligomerization with dimethyldiethoxysilane

Bennevault‐Celton¹,

Maciejak²,

Desmazières

et al. 2010

Polymer International

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show abstract

“…Within the context of research dealing with the improvement of the mechanical characteristics of aged papers with simultaneous deacidification, it was observed that the introduction of aminoalkylalkoxysilanes (AAAS) in a cellulose fibre web gave new desirable properties to aged or unaged papers 1–4. This technique used solutions of these compounds in ethanol, and the new properties were thought to arise from the formation of a polysiloxane network self‐developed in the paper on the fibre surface.…”

Section: Introductionmentioning

confidence: 99%

Condensation of alkoxysilanes in alcoholic media: I. Oligomerization of dimethyldiethoxysilane

Bennevault‐Celton¹,

Maciejak²,

Desmazières

et al. 2009

Polymer International

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In the context of the preservation of cultural heritage, the treatment of paper by an aminoalkylalkoxysilane, or its mixture with dimethyldiethoxysilane, has given encouraging results. Diluting the monomer bearing the amino function could contribute to obtaining a flexible network interpenetrating the fibre network. Due to the complexity of the system, the work presented here begins with a study of dimethyldiethoxysilane condensation under the conditions used for the paper deacidification (alcoholic medium, neutral condition, etc.). No detectable exchange reaction with ethanol was observed in anhydrous systems of dimethyldiethoxysilane for 24 h, but in the presence of water, hydrolysis and exchange were observed, the rate constant of the former being higher than that of the latter by one order of magnitude. In methanol, in the presence of water, condensation leading to dimerization was observed within less than three days, with polycondensation requiring a much longer time. From the rate constant measurements, in the presence of water, it appears that the condensation reaction is the slowest reaction. It can be concluded that with freshly prepared dimethyldiethoxysilane solutions in ethanol, this monomer cannot homopolymerize. The next step will be to determine to what extent it can be integrated into the network formed by the polycondensation of aminoalkylalkoxysilane.www.soci.org V Bennevault-Celton et al.material, i.e. inside paper. The next step of this research is to investigate the behaviour of mixtures of DMDES with an AAAS under the same conditions.

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“…This phenomenology was introduced a few years ago, 19,20 but recent studies aim at characterizing in detail such a phase. 21,22 As mentioned by Drzal, 23 composite properties depend strongly on interfacial properties and interphase nature.…”

Section: Dielectric Investigation Imentioning

confidence: 94%

Dielectric investigation of interphase formation in composite materials. I. Ionic conductivity and permittivity exploration

Bartoloméo

Chailan

Vernet

2000

J. Polym. Sci. B Polym. Phys.

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The adhesion promotion mechanism of organofunctional silanes

Cited by 49 publications

References 4 publications

Condensation of alkoxysilanes in alcoholic media: II. Oligomerization of aminopropylmethyldiethoxysilane and co‐oligomerization with dimethyldiethoxysilane

Condensation of alkoxysilanes in alcoholic media: II. Oligomerization of aminopropylmethyldiethoxysilane and co‐oligomerization with dimethyldiethoxysilane

Condensation of alkoxysilanes in alcoholic media: I. Oligomerization of dimethyldiethoxysilane

Dielectric investigation of interphase formation in composite materials. I. Ionic conductivity and permittivity exploration

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