Characterization of two Nitrile-epoxy Structural Adhesives

Morris, C. E. M.; Pearce, P. J.; Davidson, R. G.

doi:10.1080/00218468208073212

Cited by 18 publications

(1 citation statement)

References 10 publications

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“…In addition to the effects of the solid surface, a thermoset is reacting in the presence of the substrate. Thermosetting resins can contain impurities, and often a mixture of many monomers, which can vary both in composition and molecular weight. , Preferential diffusion of different monomers or low-molecular-weight plastizers to the surface can change the interfacial cure behavior. In addition, the substrate surface is often coated with a sizing layer (often a silane coupling agent) to promote adhesion and durability at the interface. − The sizing layer can vary in thickness from tens of angstroms to hundreds of nanometers depending on the application.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Response of a Fluorescent Dye Grafted to Glass

et al. 2000

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The properties of an epoxy/glass interfacial region are studied by covalently grafting a fluorescent probe to the glass surface. A dimethylaminonitrostilbene fluorophore is tethered to a triethoxysilane-coupling agent, generating a fluorescently labeled silane coupling agent (FLSCA). The glass surface is coated with a silane layer that was doped with small amounts of FLSCA. When the FLSCA-doped, silane-coated glass is immersed in epoxy resin, a 42-nm blue shift in fluorescence occurs during resin cure over the grafted FLSCA layer. When the dye is dissolved in bulk epoxy a 64-nm blue shift occurs during resin cure. The difference in blue shift is attributed to higher polarity and enhanced mobility in the buried interface.

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Section: Introductionmentioning

confidence: 99%

Interfacial Response of a Fluorescent Dye Grafted to Glass

et al. 2000

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Liquid‐rubber‐modified epoxy adhesives cured with dicyandiamide. I. Preparation and characterization

Lee

Wang

Chin

1986

J of Applied Polymer Sci

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Synopsisn-Butylacrylate/acrylic acid (nBA/AA) copolymers were synthesized and used to modify epoxy resin (DGEBA) cured with dicyandiamide (DICY). The precuring reaction between nBA/AA copolymer and DGEBA, the curing cycle of DGEBA, and the effects of DICY and aluminum powder upon the adhesive strengths of modified DGEBA were studied. It was found that the optimum DICY/DGEBA ratio was 6 g/100 g, and lap shear strength and T-peel strength increased with increasing amount of aluminum powder. The curing cycle for modified DGEBA was determined to be 1 h at 177O C.

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Aging and performance of structural film adhesives. IV. A modified epoxy with improved ambient temperature shelf life

Pearce¹,

Ennis²

1993

J of Applied Polymer Sci

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SYNOPSISIt appears that improved latency in nitrile epoxy adhesives can be achieved by replacing the commonly used urea accelerator with one of much reduced solubility but similar chemical activity. A new, commercially available film adhesive claimed to possess a shelf life of 1 year at 22"C, excellent resistance to humidity prior to cure, and a service temperature range of -55 to 12OOC has been examined. Areas studied included characterization, cure kinetics, adhesive performance, and shelf life. Its composition was found to be a variant of the 12OOC curing nitrile-epoxy systems using a urea-accelerated dicyandiamide cure.Two novel features were noted the presence of bisphenol S and the urea 1,l'-p-phenylenebis (3,3-dimethyl) urea. The relatively high shear strength found at elevated temperatures could be related to the adhesive's high Tg of 155OC resulting from the addition of bisphenol S and the improved room-temperature latency was due to the ultralow solubility of the urea accelerator. Good durability was obtained from aluminum joints prepared using a simple silane pretreatment. Aging experiments indicated a shelf life of at least 3 months at 23°C under both dry and wet conditions, and it is predicted that adhesives of this type of composition would be stable for at least 1 year at normal domestic refrigeration temperatures of 5-1OoC. 0 1993 John Wiley & Sons, Inc.

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Characterization of two Nitrile-epoxy Structural Adhesives

Cited by 18 publications

References 10 publications

Interfacial Response of a Fluorescent Dye Grafted to Glass

Interfacial Response of a Fluorescent Dye Grafted to Glass

Liquid‐rubber‐modified epoxy adhesives cured with dicyandiamide. I. Preparation and characterization

Aging and performance of structural film adhesives. IV. A modified epoxy with improved ambient temperature shelf life

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