Comparison of Two-Component Silyl-Terminated Polyether/Epoxy Resin Model and Complete Systems and Evaluation of Their Mechanical, Rheological and Adhesive Properties

Abstract

The current research is devoted to the investigation of the influence of a secondary amine compatibilizer and customized additive package on the tensile, rheological and adhesive properties of a Silyl-terminated polyether (SIL)/Epoxy resin (EP) model and completed two-component systems. A SIL/EP model and completed two-component systems were developed over a broad range of the both pre-polymer ratios (90/10–30/70 wt.-to-wt%). Additive packages of the components A and B were designed to prevent premature polycondensation of the respective pre-polymers (including suitable catalysts for each of the pre-polymers, as well as vinyltrimetoxysilane as a drying agent for moisture control), to ensure easy processing and stable performance of the system. Results of the investigation testify that the values of the tensile strength and Shore-A hardness of the compatibilized systems are higher in comparison to unmodified ones. In the presence of the additive package, a further improvement of tensile strength and tensile strain values is observed for SIL-rich compositions (SIL content above 70 wt%), whereas at lower SIL concentrations, the reinforcing effect is considerably reduced. In respects to adhesion properties, the highest values to a broad range of substrates with different surface polarities are observed at the SIL/EP range from 80/20 to 50/50 wt.-to-wt%.

Research of Potential Catalysts for Two-Component Silyl-Terminated Prepolymer/Epoxy Resin Adhesives

“…Adhesion and material mechanical properties are largely dependent on the polymers, plasticizers, fillers and adhesion promoters present in the system, but it is very important to choose specific and effective catalyst systems to achieve good adhesion, workability time and the best possible mechanical properties ensuring the formation of a polymer network [ 10 , 11 , 12 ]. Organic catalysts containing tin mostly are used for silyl-terminated polymer systems (SIL) because they are able to harden silyl-terminated prepolymer even at low concentrations, and they are also stable in systems, which contain water [ 13 , 14 , 15 , 16 , 17 , 18 ]. Epoxy resins (EPs) are cured with various substituted amines, which allow them to be activated without using a functional amine connection, as a result without using a third polymer system in the formation of material properties [ 16 , 17 ].…”

“…Epoxy resins (EPs) are cured with various substituted amines, which allow them to be activated without using a functional amine connection, as a result without using a third polymer system in the formation of material properties [ 16 , 17 ]. In the current research, attention is devoted to research suitable catalysts for two-component SIL/EP systems [ 18 ]. The catalyst must selectively cure a particular prepolymer without solidifying the other, in the component of which it will be incorporated to form the final adhesive material.…”

Experimental and Numerical Investigation on Pile Foundation Underpinning Structure System in Urban Overpass

“…Fortunately, the development of polymer composite reinforcing adhesive anchoring technology for pile foundation underpinning has created new ideas. Epoxy resin reinforcing adhesive of planting rebar as a commonly used composite building structural adhesive material, with excellent adhesive properties, chemical stability, and strong heat resistance, has attracted scholars in various fields of research [31,32] while also adding a variety of new polymers of composite epoxy resin materials and new epoxy resins with specific properties have also appeared ones after another, such as the novel in situ polytriazolesulfone modified epoxy and the epoxy resin modified with biodegradable polymer [33][34][35]. De Maio et al [36] proposed the reinforcing effect of nano-modified epoxy resin on the structural response of fiber-reinforced polymer (FRP)-plated reinforced concrete (RC) components and emphasized the beneficial effects of the nano-enhanced epoxy resin on the bond strength between concrete and FRP systems.…”