Miscibility and fracture energy of probe tack for acrylic pressure-sensitive adhesives: acrylic copolymer/tackifier resin systems

✍ Scribed by Hyun-Joong Kim; Shunji Hayashi; Hiroshi Mizumachi

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 206 KB
• Volume: 69
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980718)69:3<581::aid-app18>3.0.co;2-w

✦ Synopsis

The relationship between the miscibility of acrylic pressure-sensitive adhesive (PSA) and the fracture energy (W ) (Jm 02 ) of the probe tack was investigated, wherein the master curve of W was compared with that of the maximum force ( s max ) (gf) of the probe tack. It was ascertained that W of acrylic PSA was closely related to the miscibility between the components (acrylic copolymer and tackifier resin). In the case of the miscible blend system, the master curve of W shifted toward the lower rate side and, at the same time, the magnitude decreased as the tackifier resin content increased. The degree of the shift of W was extremely smaller than that of s max . In the case of the immiscible blend system, the master curve of W remarkably decreased as the tackifier resin content increased, which suggests the fact that W of the PSA depended on the dynamic mechanical properties of the matrix phase and that the resin-rich phase acted as a kind of filler, thus reducing the practical performance.