Abstract
In this study, syntheses of acrylate copolymers were performed based on the monomers butyl acrylate (BA), 2-ethylhexyl acrylate (2-EHA), and acrylic acid (AA) and the second-type unsaturated photoinitiator 4-acryloyloxybenzophenone (ABP). The structure of the obtained copolymers was confirmed via FT-IR spectroscopic analysis, and the viscosity and the content of non-volatile substances were determined. The adhesive films were then coated and cross-linked using ultraviolet radiation in the UV-C range at various doses (5–50 mJ/cm2). Due to the dependence of the self-adhesive properties of the adhesive layer on the basis weight, various basis weights of the layer in the range of 30–120 g/m2 were tested. Finally, the self-adhesive properties were assessed: tack, peel adhesion, shear strength (cohesion) at 20 °C and 70 °C, as well as the SAFT test and shrinkage. The aim of the study was to determine the effect of the type of monomer used, the dose of ultraviolet radiation, and the basis weight on the self-adhesive and usable properties of the obtained self-adhesive tapes.
Highlights
Acrylate-based pressure-sensitive adhesives are an interesting group of adhesives, among the most commonly used in industry
Among the pressure-sensitive adhesives used in the form of solvent-based, solvent-free, or water dispersions, polyacrylate adhesives have gained special importance due to their excellent properties
The main aim of the study was to determine the influence of the type of monomer and its amount on the self-adhesive properties of adhesive film Syntheses with butyl acrylate, 2-ethylhexyl acrylate, acrylic acid, and a type II unsaturated photoinitiator (ABP) were performed
Summary
Acrylate-based pressure-sensitive adhesives are an interesting group of adhesives, among the most commonly used in industry. According to the modern definition, an adhesive is a substance capable of permanently bonding the surfaces of solids, which, after the evaporation of the solvent (solvent adhesives), water (dispersion adhesives), or cooling (hot-melt adhesives), form a self-adhesive layer of organic polymer on the substrate [3,4]. Among the pressure-sensitive adhesives used in the form of solvent-based, solvent-free, or water dispersions, polyacrylate adhesives have gained special importance due to their excellent properties. The main criterion for determining whether a given type of polymer can be used as a macromolecular substance with self-adhesive properties is its glass transition temperature [8]. The most typical representatives of macromolecular compounds used in the production of self-adhesive materials, in addition to the previously discussed acrylate copolymers, are natural rubber, synthetic rubbers, copolymers of ethylene and acrylic acid, polyvinyl ethers, polyurethanes, polysiloxanes, and polyacrylates [9,10,11]
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