Fracture Toughness of a Silane Coupled Polymer-Metal Interface: Silane Concentration Effects

Berry, Douglas H.; Namkanisorn, Apinan

doi:10.1080/00218460590944657

Cited by 26 publications

(4 citation statements)

References 23 publications

(49 reference statements)

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“…Organofunctional silane coupling agents are commonly used as mediator to bind organic materials to inorganic materials [29]. Ye et al [30] applied a silane primer to enhance the strength of the FRP-to-concrete bonded interface.…”

Section: Introductionmentioning

confidence: 99%

Deterioration of the FRP-to-concrete interface subject to moisture ingress: Effects of conditioning methods and silane treatment

Amidi

Wang

2016

Composite Structures

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Please cite this article as: Amidi, S., Wang, J., Deterioration of the FRP-to-concrete interface subject to moisture ingress: effects of conditioning methods and silane treatment, Composite Structures (2016), doi: http://dx. AbstractFiber reinforced plastics (FRP) composites have emerged as one popular material in retrofit/rehabilitation of concrete structural members in last decades. The long-term durability of the FRP-to-concrete interface in aggressive environments plays a critical role in the success of this technique. An experimental program has been carried out in this study to examine the effect of moisture on the deterioration of the FRP-to-concrete interface. In addition to condition the specimens through fully submerging the specimens in water, a new method to condition the specimen through submerging only the bottom half of the specimen in water was used in this study. Testing results suggest that the fracture toughness of the FRP-to-concrete interface conditioned through half immersion is significantly higher than that of the interface conditioned through full immersion. Three possible responsible mechanisms have been identified: different moisture distributions along the epoxy-concrete interface induced by conditioning methods; faster moisture diffusion through the epoxy-concrete interface, and hygroscopic swelling stress induced by the swelling of the epoxy after absorbing moisture. The significant effect of the conditioning method on the durability of the FRP-to-concrete interface makes us postulate that the laboratory testing method based on full immersion of the specimen in water could exaggerate the deterioration of the interface induced by the moisture in real applications, in which the 1 Corresponding author. Tel.: +1 205 348 6786; fax: +1 205 348 0783. Email address: jwang@eng.ua.edu (J.Wang) 2 interface is exposed to air, rather than water. In such a case, neither the moisture diffusion along the epoxy-concrete interface nor the swelling of the interface is as significant as in the case of full immersion in water used in the laboratory testing. In addition, this study also evaluated the potential of silane coupling agent on enhancing the durability of the FRP-to-concrete interface in moisture conditions.

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Section: Introductionmentioning

confidence: 99%

Deterioration of the FRP-to-concrete interface subject to moisture ingress: Effects of conditioning methods and silane treatment

Amidi

Wang

2016

Composite Structures

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“…Aisawa et al reported a method for adhesion of carbon steel and natural rubber by functionalized silane . Mechanisms for silane adhesion promoters have been extensively studied and can be found elsewhere . Silane can provide hybrid linkages between organic matrices and inorganic reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Interfacial adhesion and water resistance of stainless steel–polyolefin improved by functionalized silane

Wang

Long

et al. 2019

Polymer Engineering & Sci

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The adhesion strength and water resistance of stainless steel and adhesive resin composites determine the longterm performance of wires and cables; however, adhesion at stainless steel interfaces is difficult. Herein, we prepared ethylene acrylic acid/linear low-density polyethylene (EAA/LLDPE) blends with good mechanical and adhesive properties. Silane was anchored to the surface of stainless steel. The effects of silane functionalization on the adhesion surface were investigated by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The reaction mechanism between the stainless steel, silane, and EAA/LLDPE revealed adhesion was optimized when a 3:7 volume ratio of 3-methacryloxypropyltrimethoxysilane (MEMO): 3-aminopropyltrimethoxysilane (A-1110) was used to modify the stainless steel substrate. SEM images of EAA/LLDPE film peel surfaces found the silane-treated stainless steel substrates produced rough surfaces with a uniform void indicating the silane treatment enhanced the stainless steel and EAA/LLDPE film interaction. The stainless steel and EAA/LLDPE film adhesion and water resistance improved and the peel strength after water resistance testing at 68 C for 168 h increased from 3.18 N/cm to 9.37 N/cm compared to untreated stainless steel. Silanemodified stainless steel and EAA/LLDPE blend film composite materials demonstrate potential for application in wires and cables used in environmental corrosion-resistant applications.

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“…A coupling agent introduces strong chemical bonds at the interface of two dissimilar materials to strengthen the interfacial adhesion. Chemical nature of the coupling agents and their processing control that enable chemical bond formation between the joining materials have been discussed [3][4][5]. These studies were focused on the chemical behavior of silane-based coupling agents.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Toughening of Epoxy–Copper Interface Using a Thiol-Based Coupling Layer

Wong

Leung

Fan

2011

Journal of Adhesion Science and Technology

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A novel concept of tuning the fracture properties of the interface through the treatment process of the coupling layer according to the cohesive critical strain energy release rate of the epoxy is proposed for optimizing the joint strength between epoxy and copper substrate. In most coupling agent application recipes, the treatment condition design has omitted the influence of the fracture properties of the corresponding adhesive. Conceivably, excessive strengthening of the adhesive-substrate interface may not lead to optimal interfacial strength. Synergistic toughening of the interface takes place when there is simultaneous interfacial debonding and failure of adhesive under a comparable critical stress state. Under critical applied load, energy is concurrently dissipated through the fracture of the interface, the fracture in the adhesive, and possible non-reversible failure processes such as shear yielding or micro-cracking of the adhesive. These combined energy dissipation processes result in extensive energy absorption around the crack tip. The adhesive joint, therefore, becomes more crack resistant.In this study, the interfacial adhesion promotion concept with synergistic toughening was demonstrated using three different epoxy systems bonded to copper substrates modified by a thiol-based coupling layer. The coupling layer was formed by treating the copper substrate with a thiol-based coupling agent. Critical strain energy release rate of the treated tapered double cantilever beam samples in different treatment conditions was measured for each of the epoxy systems. From the failure path analysis, mixed interfacial and cohesive failure was observed. This observation indicated that extensive energy dissipation occurs around the crack tip that results in synergistic toughening of the interface. This work shows the significance of matching the fracture property of the coupling layer with the adhesive. Up to 2.3 times improvement in the critical strain energy release rate was achieved with optimized thiol treatment compared to non-optimized treatment.

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Fracture Toughness of a Silane Coupled Polymer-Metal Interface: Silane Concentration Effects

Cited by 26 publications

References 23 publications

Deterioration of the FRP-to-concrete interface subject to moisture ingress: Effects of conditioning methods and silane treatment

Deterioration of the FRP-to-concrete interface subject to moisture ingress: Effects of conditioning methods and silane treatment

Interfacial adhesion and water resistance of stainless steel–polyolefin improved by functionalized silane

Synergistic Toughening of Epoxy–Copper Interface Using a Thiol-Based Coupling Layer

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