ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 1 June 2005
Page Count: 8

Interfacial Diffusion of Fluids in Pressure Sensitive Adhesives

O'Brien, EP
Guest Researcher, National Institute of Standards and Technology, Gaithersburg, MD
Center for Adhesive and Sealant Science, Blacksburg, VA

Ward, TC
Center for Adhesive and Sealant Science, Blacksburg, VA
Professor, Department of Chemistry, Blacksburg, VA

(Received 5 August 2004; accepted 20 December 2004)

Abstract

Diffusion of acetone at the interface of a bonded pressure sensitive adhesive tape was measured using single frequency capacitance measurements (SFCM) and a novel interdigitated electrode sensor design. The relative concentration of acetone at the bondline as a function of distance from the edge of the specimen and exposure time was correlated to adhesion loss measured by the 90° peel test. This work suggests that these novel sensors are applicable for the study of interfacial diffusion processes, and could be extended to other coatings or adhesives in a variety of environments.

Keywords:
interfaces, impedance, dielectric spectroscopy, non-destructive testing, durability, diffusion, coatings, water, neutron reflectivity

Paper ID: JAI12956
DOI: 10.1520/JAI12956
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