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http://dx.doi.org/10.7317/pk.2014.38.4.491

Effect of Photoinitiators on Adhesion Properties of 2-EHA/AA PSA  

Yoon, Hong-Beom (Department of Polymer Science, Kyungpook National University)
Kim, Ho-Gyum (Department of Polymer Science, Kyungpook National University)
Min, Kyung-Eun (Department of Polymer Science, Kyungpook National University)
Publication Information
Polymer(Korea) / v.38, no.4, 2014 , pp. 491-495 More about this Journal
Abstract
Pressure sensitive adhesive (PSA) based on 2-ethylhexyl acrylate (2-EHA)/acrylic acid (AA) copolymer was synthesized using different photoinitiators. Results showed that PSA with Irgacure$^{(R)}$651 (benzyldimethylketal) and Irgacure$^{(R)}$184(1-hydroxy-cyclohexylphenyl ketone) proved to be good for adhesion properties. This may be attributed to strong absorption near 350 nm wavelength and also high solubility in monomer mixtures. The addition of Irgacure$^{(R)}$819, bisacylphosphine oxides as a photoinitiator caused cohesive failure with high loading in a peel test owing to the additional radical formation. It is assumed that the insoluble photoinitiator reacts with oxygene, which may act as a hydrogen donor.
Keywords
PSA; acrylic copolymer; adhesion properties; photoinitiator; tack; peel strength;
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