Document Type

Article

Disciplines

1.4 CHEMICAL SCIENCES, Electrochemistry

Publication Details

Authors' submitted version.

International Journal of Adhesion and Adhesives

Published: https://www.sciencedirect.com/science/article/pii/S0143749623001045

https://doi.org/10.1016/j.ijadhadh.2023.103424

Abstract

This work presents the use of a simple microcalorimetry cyanoacrylate (CA) polymerisation system for investigating aspects of CA adhesive cure through gap and adsorption of adhesive acid stabiliser by a range of metal and glass substrates. It is well established that strong acid induced inhibition periods (IPs) are almost directly proportional to the acid concentration in weak base initiated polymerisations of alkyl CAs in tetrahydrofuran (THF). Ethyl cyanoacrylate (ECA) polymerisation IP measurements were used to determine the adsorption of methanesulfonic acid (MSA) in THF or ECA solutions by a range of metal, glass and polypropylene (PP) lap shears surfaces. The extent of substrate acid sorption was found to decrease in the order: Copper- zinc alloy (C23000) > grit blasted mild steel > aluminium alloy 2024T3 > mild steel > glass > aluminium > stainless steel alloy 304 > PP. Differences in the extent of acid sorption were accounted for in terms of two effects: surface acidity/basicity and surface area (roughness). The decrease in MSA concentration following lap shear immersion in an MSA solution was related to the reactivity of the substrates for catalysing bond line polymerisations as described in a recently reported confocal Raman spectroscopic study of ECA /substrate reactivity.

DOI

https://doi.org/10.1016/j.ijadhadh.2023.103424

Creative Commons License

Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.

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