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http://dx.doi.org/10.17702/jai.2015.16.2.55

Effect Of Silica Concentration and Crosslinking Agent on Adhesion Properties and Thermal Stability Of UV Cured 2-EHA/AA PSAs  

Kim, Ho-Gyum (Department of Polymer Science, Kyungpook National University)
Publication Information
Journal of Adhesion and Interface / v.16, no.2, 2015 , pp. 55-62 More about this Journal
Abstract
It was investigated that the effect of surface modification and concentration of fumed silica on the adhesion properties and thermal stability of 2-EHA/AA pressure sensitive adhesive (PSAs) prepared by UV irradiation. The influence of repeating units of crosslinking agent on PSAs were also studied. From SEM analysis, PSAs synthesized with surface modified silica had finer dispersion of silica particles in polymer matrix due to the interfacial interaction. Results of the study showed that increase in tack and peel strength when under 0.3 wt% of silane treated silica were added in the reaction mixture. The addition of PEGDMA for crosslinking agent offers positive effect on adhesion properties in comparison with PSAs using EGDMA for crosslinker, which may be attributed to high mobility of ethylene oxide repeating units in PEGDMA. From the thermal degradation residue of PSAs, it was revealed that thermal stability was improved with silica addition due to the strong interfacial bonding between silane modified silica and polymer matrix, which may act as a thermal barriers into 2-EHA/AA PSAs.
Keywords
pressure sensitive adhesive; acrylic copolymer; silica; silane; nanofiller;
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