Long-term adhesion durability revealed through a rheological paradigm

Area of Science:

• Physics
• Materials Science
• Rheology

Background:

• Traditional adhesion studies focus on short-term phenomena, failing to explain long-term adherence and sudden detachment.
• Existing models do not account for bulk rheology's role in long-term adhesion durability.

Purpose of the Study:

• To investigate the physics of long-term adhesion using a rheological paradigm.
• To develop accurate models for predicting adhesion lifetimes.
• To uncover novel phenomena in long-term adhesion.

Main Methods:

• Theoretical modeling incorporating bulk rheology and interfacial viscoelasticity.
• Experimental validation of theoretical predictions.
• Analysis of contact area dynamics under tensile stress.

Main Results:

• Long-term adhesion durability is governed by the competition between bulk rheology and interfacial viscoelasticity.
• Accurate adhesion lifetime predictions were achieved and experimentally validated.
• A counterintuitive phenomenon of contact area expansion under tensile forces was observed in long-term adhesion.

Conclusions:

• The study provides a comprehensive understanding of long-term adhesion physics.
• The findings bridge the gap between short-term and long-term adhesion phenomena.
• This research offers new avenues for designing materials with predictable adhesion properties.