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Polymer Rheology as Related to Adhesives

SpecialChem / Edward M Petrie – Jan 19, 2005

Rheology is the science of deformation and flow of matter. The study of adhesion is often referred to as multidisciplined, and rheology is as important as any other discipline when studying adhesive systems. However, rheology is elusive for many adhesive formulators and end-users because it uses complex models and theories that are not familiar except, perhaps, to the polymer scientist. Rheology plays a vital role in all of the adhesion processes. These processes include application; surface flow and wetting; penetration into surface topology, pores, and narrow joint gaps; diffusion over interfaces; solidification; and resistance to internal and externally applied stress. Both theory and experiment have established a close connection between the rheological and adhesive properties of polymers. This article will neither develop the science of rheology nor rigorously apply it to adhesion phenomena. This would require an immense amount of work and assume a significant educational background on the part of the reader.

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