Rheological analysis of the adhesion surface with a scanning probe microscope (SPM) |
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| Authors: | Youichiro SakaguchiNaofumi Kosaka Naruhito HoriTadahisa Iwata Akio Takemura Eriko Harada |
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| Affiliation: | a Laboratory of Polymeric Materials, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
b Central Research Laboratory, Research & Development Department, Harima Chemical, Inc., 671-4 Mizuashi, Noguchi-cho, Kakogawa, Hyogo 675-0019, Japan |
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| Abstract: | The frictional forces between pressure sensitive adhesives (PSAs), including rosin tackifier resin, and a probe tip were measured with scanning probe microscopy (SPM). A peak that appeared in the scanning rate-frictional force curve shifted to a lower scanning rate with decrease in temperature. The frictional force reflects rheological behavior of the PSA. In the case of the miscible system, the tendency of a peak to shift to a lower scanning rate was observed with increase in tackifier content; however, in the case of the immiscible system, no remarkable shift was observed. The frictional force is influenced by viscoelastic properties of the PSA, which systematically changed with miscibility. The high-scanning rate resulted in the interfacial failure on the surface, while the low-scanning rate resulted in the cohesion failure. |
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| Keywords: | Atomic force microscopy Rheology Interfaces Pressure-sensitive |
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