Preparation and adhesion performance of UV-crosslinkable acrylic pressure sensitive adhesives

被引：0
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作者：
Do, Hyun-Sung [1 ]
Park, Young-Jun [1 ]
Kim, Hyun-Joong [1 ]
机构：
[1] Lab. of Adhesion and Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, Korea, Republic of
来源：
Journal of Adhesion Science and Technology | 2006年 / 20卷 / 13期
关键词：
UV-crosslinkable acrylic pressure sensitive adhesives (PSAs) were synthesized by copolymerization of 2-ethylhexyl acrylate (2-EHA); vinyl acetate (VAc); acrylic acid (AA); 2-hydroxyethyl methacrylate (2-HEMA) and 4-acryloyloxydiethoxy-4′-chlorobenzophenone (unsaturated photoinitiator); with varying contents of 2-HEMA and photoinitiator; by solution polymerization. The UV-crosslinking behavior of the PSAs was studied by ATR-FT-IR spectroscopy; and PSA performance was characterized by probe tack; peel resistance and shear adhesion failure temperature (SAFT). As 2-HEMA acts as a good hydrogen donor to benzophenone; the efficiency of the photo-reaction was enhanced; thus with increasing contents of 2-HEMA and photoinitiator in the PSAs the incorporation of benzophenone groups in the PSAs; even at low UV doses; was quite fast. In addition; as the crosslinking reaction proceeds via photo-reaction mainly between 2-HEMA and photoinitiator; the probe tack and peel resistance of the PSAs having high concentrations of 2-HEMA and photoinitiator rapidly decreased in the early stage of UV irradiation due to increased crosslink density. These phenomena were also observed in the SAFT test; with the PSAs containing high levels of 2-HEMA and photoinitiator showing high SAFT values at low UV doses. © VSP 2006;
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页码：1529 / 1545
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