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Received April 13, 2015
Accepted July 8, 2015
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Effects of composition and layer thickness of a butyl acrylate/acrylic acid copolymer on the adhesion properties
Department of Chemical Engineering, University of Seoul, 163, Siripdae-ro, Dongdaemun-gu, Seoul 130-743, Korea
jhkimad@uos.ac.kr
Korean Journal of Chemical Engineering, February 2016, 33(2), 707-710(4), 10.1007/s11814-015-0148-1
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Abstract
Acrylic pressure-sensitive adhesives are synthesized by solution copolymerization using n-butyl acrylate and acrylic acid (AA) in ethyl acetate anhydrous. The copolymer composition is controlled for good adhesive properties by varying AA content. The monomer conversion is measured by the gravimetric method and FTIR technique. The adhesive layer thickness is measured by scanning electron microscopy, and the adhesive properties are evaluated with loop tack, 180o peel, and holding time measurements. The peel force increases with increasing the AA content up to 3 wt% and decreases at the AA content higher than 3 wt%, but the tack force decreases with increasing the AA content. The holding time increases with increasing the AA content, and it shows a similar trend with the Tg of adhesives. The increase of layer thickness improves tack and peel forces, but it weakens the holding power. A tape thickness of about 20 μm shows well-balanced properties at 3 wt% AA content in the acrylic copolymer system.
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References
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