Coupling agents, analysis

The formation of these polar groups contributes increased adhesion. Observation of disappearing vinyl groups in the silane coupling agent and of the formation of polystyrene in the silica by FTIR analysis (Fig. 15) have confirmed the occurrence of a reaction between the polymer and the silane coupling agent [77]. 

Culler, S.R., et. at. "Factor Analysis Applied to a Silane Coupling Agent on E-Glass Fiber System", Appl. Spec. 1984 (38) 495-500. 

Spectroscopic techniques are extremely useful for the characterization of filler surfaces treated with surfactants or coupling agents in order to modify interactions in composites. Such an analysis makes possible the study of the chemical composition of the interlayer, the determination of surface coverage and possible coupling of the filler and the polymer. This is especially important in the case of reactive coupling, since, for example, the application of organofunctional silanes may lead to a complicated polysiloxane interlayer of chemically and physically bonded molecules [65]. The description of the principles of the techniques can be found elsewhere [15,66-68], only their application possibilities are discussed here. 

Keywords E glass surface analysis silane coupling agent fibre composites. 

Analysis of variance (ANOVA) was used to determine the effects of coupling agent, concentration, and line speed on adhesion. Significant differences among means were determined by Duncan s multiple range test, using a 95% confidence level. 

Table 3 contains the results of an analysis of the variables of concentration and line speed across all coupling agents. As shown by this test, combinations of low concentration and low line speed, and high concentration and high line speed... 

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