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Direct Formation of Silane Coupling Agents on Glass for Improved Composite Performance

机译：在玻璃上直接形成硅烷偶联剂以改善复合材料性能

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This research resulted in the formation of hydrolytically stable, grafted silane coupling layers on glass surfaces. This was be accomplished by: (1) hydrogenation of glass substrates: (2) synthesis of aminoalkenes; and (3) reaction of aminoalkenes with the reduced surface via a hydrosilylation reaction which formed the coupling agent directly on the surface of the glass fiber for glass surfaces incorporated into epoxy systems. In addition, chlorination of the glass surface followed by reaction with haloalkenes through a Grignard reaction, formed an unsaturated coupling agent on the glass surface for incorporation into vinyl esters based polymer systems. The grafted silane monolayers were identified through infrared spectroscopy, contact angle goniometry and x-ray photoelectron spectroscopy. Hygrothermal testing was performed by measuring the flexural strength and modulus in 4-point bending before and after environmental exposure. Both short-term (24 and 48 hours in boiling water) and long-term (5 week cycle having temperature and humidity values similar to aircraft exposure) hygrothermal tests were performed. In general, the grafted glass surfaces and composites made from this material proved more resistant to environmental exposure than untreated glass surfaces and glass surfaces treated with conventional silanes.

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