The Influence of Silane Coupling Agent on Glued Spruce Wood Using Epoxy Adhesive

2014 ◽  
Vol 897 ◽  
pp. 99-102
Author(s):  
Jan Vanerek ◽  
Anna Benešová ◽  
Petr Klímek
Keyword(s):  
Shear Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Strength Properties ◽  
Epoxy Adhesive ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Main Criterion ◽  
Spruce Wood ◽  
Silane Coupling

The paper deals with the evaluation of epoxy adhesive modification by silane coupling agent used for gluing process of spruce wood. Moreover, the usage of primer containing the silane coupling agent was performed to find out, whether better compatibility between spruce wood and epoxy adhesive at the interface bondline can ensure sufficient resistance to delamination process. As the main criterion, tensile shear strength properties of glued specimens in different thermal and moisture exposures were carried out.

scholarly journals Effects of Crosslinking and Silicone Coupling Agent on Properties of EVA Composite Hot Melt Adhesive

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4101
Author(s):  
Zijin Wu ◽  
Yonggang Shangguan ◽  
Chunhui Zhang ◽  
Qiang Zheng
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Crosslinking Agent ◽  
Ethylene Vinyl Acetate ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Silane Coupling ◽  
Hot Melt

In order to improve the bonding performance, EVA composite hot melt adhesives were prepared by introducing crosslinking agent and silane coupling agent in this paper. A binary EVA resin blend as the base resin with appropriate viscosity and tensile shear strength was selected as hot melt adhesive. The effects of crosslinking agent and silane coupling agent on the properties of ethylene/vinyl acetate (EVA) composite hot melt adhesive were studied. By investigating the preparation and curing conditions of hot melt adhesive and the properties of hot melt adhesive after the introduction of dicumyl peroxide (DCP), the optimum temperature and dosage of DCP and its influence on the properties were determined. It was found that the tensile shear strength of hot melt adhesive increased from 0.247 MPa to 0.726 MPa when 2 phr DCP and 5 phr KH570 were added at the same time. The tensile strength and tensile shear strength of hot melt adhesive are only slightly improved when silicone coupling agents with different functional groups are added to EVA composite hot melt adhesive. However, it was found that excessive silane coupling agent would significantly reduce the tensile strength and shear peel strength of the material.

scholarly journals Effect of Ultrasonic Vibration on Adhesive Bonding of CFRP/Al Alloy Joints Grafted with Silane Coupling Agent

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 947 ◽  
Author(s):  
Min Wu ◽  
Xuetong Tong ◽  
Hui Wang ◽  
Lin Hua ◽  
Yizhe Chen
Keyword(s):  
Shear Strength ◽  
Chemical Bond ◽  
Ultrasonic Vibration ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Adhesive Bonding ◽  
Adhesive Layer ◽  
Al Alloy ◽  
Silane Coupling ◽  
The Impact

Adhesive bonding is widely used in the joining of metals and carbon fiber-reinforced plastics (CFRPs). Ultrasonic vibration was used to improve adhesive bonding of CFRP/Al alloy joints grafted with silane coupling agent, and the effect of the ultrasound on the bonding was studied. The surface of Al alloy was treated with a silane coupling agent, and then the ultrasonic vibration was applied on the adherend during the adhesive bonding process. The shear strength was tested, and the mechanism was analyzed by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FTIR). It is found that the ultrasonic assisting can further promote the bonding of the Al alloy and the adhesive. For the test joins, the shear strength was increased by 267.50% using the silanization treatment plus the ultrasonic assisting. The ultrasonic assisting promoted the grafted epoxy group to react with the adhesive more sufficiently at the Al/adhesive interface by causing micro-mixing and intensified molecule collision, and thus more chemical bond was formed. Under the ultrasonic action, the interface and the adhesive layer became tighter owing to the impact contact at the interface and the oscillating flow in the adhesive layer. The ultrasonic vibration assisting increased the bonding strength by promoting the chemical bond and improving physical morphology.

Effects of Adhesive Joint on the Failure Strength Properties of Natural Fiber Reinforced Composite

2007 ◽  
Vol 353-358 ◽  
pp. 1960-1964 ◽  
Author(s):  
Ho Chel Yoon ◽  
Ren Liang Wang ◽  
Yang Bae Jeon ◽  
Jun Yong Choi ◽  
Sang Yong Lee ◽  
...  
Keyword(s):  
Shear Strength ◽  
Natural Fiber ◽  
Strength Properties ◽  
Fiber Reinforced Composites ◽  
Failure Strength ◽  
Reinforced Composites ◽  
Tensile Shear Strength ◽  
Fiber Reinforced ◽  
Tensile Shear ◽  
Fiber Layer

This research was concerned with study of failure strength of natural fiber reinforced composites. Tensile-shear tests were carried out with single-lap-adhesive-joined specimens consisting of polyester lap and composite lap. Composites were manufactured using the polyester as matrix and bamboo natural fiber layer as reinforcement. Two types of specimens with different reinforcement positions were tested to evaluate the failure strength of adhesive-single-lap-joined natural fiber reinforced composites. The test results were presented by tensile-shear strength graph comparing with finite element analysis. The failure mechanism was discussed in order to explain the lower tensile-shear strength of composite, and effect of position of bamboo natural fiber layer on the failure strength properties were explained.

scholarly journals Modified geopolymer-based wood adhesive using waterborne polyurethane

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 7573-7585
Author(s):  
Dawei Pan ◽  
Hanzhou Ye ◽  
Xiaoqian Wang ◽  
Yang Zhang
Keyword(s):  
Shear Strength ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Waterborne Polyurethane ◽  
Wood Adhesive ◽  
Geopolymer Matrix ◽  
Silane Coupling ◽  
The Matrix ◽  
Alkaline Conditions ◽  
Wood Strength

Geopolymer binders show great potential in the application of eco-friendly wood composite adhesives. The applicability of organic-inorganic hybrid-reinforced geopolymer composites as plywood binder was investigated. In this study, a geopolymer-based wood adhesive was fabricated by mixing a matrix-geopolymeric slurry; a toughening agent, waterborne polyurethane; and a silane coupling agent, that served as the covalent “bridge” between the waterborne polyurethane with a geopolymer matrix. The results showed that the waterborne polyurethane exhibited excellent compatibility with the geopolymer and served as a flexibilizer, which transformed the matrix from a microfractured structure to a denser morphology. Moreover, the shear strength of bonded plywood and the morphology of the fracture surface after the tensile measurement were measured. The resulting geopolymer/wood interface was well bonded, and the interfacial bonding strength was higher than the wood strength matrix after modification. The introduction of waterborne polyurethane and silane coupling agent improved the water resistance of the composites and increased the wet shear strength of plywood from 0 MPa to 0.35 MPa. Notably, a weak wood/alkali interface was formed under alkaline conditions due to the strong diffusion of alkali metal ions between the interfaces.

Effects of Resistance Welding on the Failure Strength Properties of Natural Fiber Reinforced Composite

2007 ◽  
Vol 353-358 ◽  
pp. 1974-1978
Author(s):  
Ho Chel Yoon ◽  
Ren Liang Wang ◽  
Montasser Dewidar ◽  
Yang Bae Jeon ◽  
Jun Yong Choi ◽  
...  
Keyword(s):  
Shear Strength ◽  
Composite Materials ◽  
Natural Fiber ◽  
Strength Properties ◽  
Failure Strength ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Fiber Layer ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

This research is concerned with a study of failure strength of natural fiber composite. Tensile-shear tests were carried out with the single-lap resistance welded joined specimens consisting of composite materials. Composite materials were manufactured using the polyester as a matrix and bamboo natural fiber layer as a reinforcement. Two types of specimen with different reinforcement positions were tested to evaluate the failure strength of natural fiber reinforced composite resistance welded joined specimens. The test results were presented by tensile-shear strength. The failure mechanism was discussed in order to explain the lower tensile-shear strength of composite and position of bamboo natural fiber layer on the failure strength properties were explained

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