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Performance of Silane Coupling Agents
1982The need for coupling agents was recognized in 1940 when glass fibers were first used as reinforcements in organic resins. Specific strength-to-weight ratios of dry glass-resin composites were very favorable, but the laminates lost much of their strength during prolonged exposure to moisture.
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Cationic Silane Coupling Agents for Thermoplastics
Polymer-Plastics Technology and Engineering, 1973I. INTRODUCTION Organofunctional silane coupling agents have been used successfully for many years on glass fibers to improve the performance of glass-reinforced polymer composites and to promote retention of properties in the presence of moisture. The “coupling” mechanism of these silanes at the organic-mineral interface is complex, but is fairly well
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Chemistry of Silane Coupling Agents
1982The “coupling” mechanism of organofunctional silanes depends on a stable link between the organofunctional group (Y) and hydrolyzable groups (X) in compounds of the structure X3SiRY. The organofunctional groups (Y) are chosen for reactivity or compatibility with the polymer while the hydrolyzable groups (X) are merely intermediates in formation of ...
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Nature of Adhesion Through Silane Coupling Agents
1982Most thermosetting polymers undergo some shrinkage during cure. This may range from 6 to 10% for polyesters to 3 to 4% for epoxies. Such shrinkage in the presence of fillers or reinforcements sets up stresses at the polymer-resin interface. Bush1 embedded strain gauge transducers in a polyester resin cured at 120°C and measured internal static ...
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Other Applications of Silane Coupling Agents
1982In addition to their applications as coupling agents in mineral-filled organic resin composites, the various organofunctional silanes are arousing much interest in other areas of surface modification. A symposium on silylated surfaces, held at the Midland Macromolecular Institute in 1978, was devoted to some of these “other” applications of silylated ...
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Aqueous Solutions of Silane Coupling Agents
1982Because organofunctional alkoxysilanes are often hydrolyzed before being applied to surfaces to function as coupling agents, it is important to understand their reactions both with and in water. Commercial practice is to apply silane coupling agents to glass from aqueous solutions of the alkoxysilanes.
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