Thermally activated parameters of self-adhesion in acrylic pressure-sensitive adhesive-like networks

Yev S. Garif, William W. Gerberich, Alphonsus V. Pocius

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We have conducted an experimental study of acrylic pressure-sensitive adhesive-like networks (PSA-LN) with the goal of establishing deconvolution of interfacial and bulk processes in adhesion. For contact adhesion testing, four types of cylindrically shaped samples were created, each synthetically modified to attain distinct bulk and surface properties. Introduction of small amounts of polar comonomers during synthesis increased the intrinsic adhesion energy, Go, from 65 mJ/m2 for an unmodified acrylic PSA-LN to 129, 158, and 218 mJ/m2 for PSA-LNs modified with 10 wt% of acrylic acid, amino acrylate, and acrylonitrile comonomers, respectively. Following a reversed trend, the critical rate of separation, v* (below which deadhesion is an intrinsically interfacial process) was more than halved from 496 nm/s for the unmodified PSA-LN to 201, 188, and 212 nm/s for those modified with the same three comonomers (same order, respectively).

Original languageEnglish (US)
Pages (from-to)61-85
Number of pages25
JournalJournal of Adhesion
Issue number1-2
StatePublished - 2004

Bibliographical note

Funding Information:
The authors would like to thank Dr. Afshin Falsafi (3M) for constructing the JKR apparatus, Dr. Lihua Li (Advanced Materials) for producing results that motivated this work, Prof. Christopher W. Macosko (University of Minnesota) for critical feedback at the inception of the work, Dr. Phillip J. Cole (Sandia National Labs) for ongoing feedback and review of our previous publications, Dr. David Giles (University of Minnesota) for assistance with rheological measurements, and Mr. Gary Korba (3M) for XPS surface composition analysis. Support from the 3M Company for Y. S. Garif is appreciated, as is support from the NSF under Grant DMI-0103169 for W. W. Gerberich.


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