Surface treatment coupling agent

The presence of surface treatments (coupling agents, stearic acid derivatives, fiber sizings, elastomeric additives) and of adsorbed water complicates the dielectric behavior, as the new interfaces may give rise to additional interfacial and ionic and dipolar relaxation processes (see the examples). 

Long-fibre Injection moulding compounds improved surface treatment/coupling agents use of high-performance fibres in forms more suitable for injection moulded thermoplastics. 

Uses Coupling agent release agent lubricant blocking agent chemical intermediate hydrophobic surface treatment silylating agent... 

Based on the mutual interaction between fillers and polymers, it is possible to classify fillers into two groups, active and inactive [22]. This classification is rather arbitrary [24], since it is based not only on differences in chemical composition but also on characteristics of filler particles surfaces, particle shape and size, and treatment of the surface by coupling agents (see Section 4.4). 

The hydrophilic SiO substrate)static water contact angle 0=3O°) was prepared by vapor-deposited SiO onto a Formvar substrate[4], with which an electron microscope grid(200-mesh) was covered. The relatively hydrophobic siliconized substrate(0=9O°) was also prepared by surface siliconized treatment a collodion-covered electron microscope grid was dipped into an aqueous solution of silane coupling agent. 

Inagaki, N., Tasaka, S. and Kawai, H. (1992). Surface modification of Kevlar 49 fiber by a combination of plasma treatment and coupling agent treatment for silicon rubber composite. J. Adhesion Sci. Technol. 6, 279-291. 

Keywords aggregation, interfacial interaction, reversible work of adhesion, wettability, matrix-filler interaction, surface treatment, interphase, surfactant, coupling agent, elastomer interlayer... 

Reactive surface treatment assumes chemical reaction of the coupling agent with both of the components. The considerable success of silanes in glass reinforced thermosets have led to their application in other fields they are used, or at least experimented with, in all kinds of composites irrespective of the type, chemical composition or other characteristics of the components. Reactive treatment, however, is even more complicated than non-reactive polymerization of the coupling agent, development of chemically bonded and physisorbed layers render the identification of surface chemistry, characterization of the interlayer... 

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