Volume 120, Number 3, November 2017
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||31 January 2018|
Rubber adhesion below the glass transition temperature: Role of frozen-in elastic deformation
1 Department of Mechanical and Industrial Engineering (MTP), Norwegian University of Science and Technology - Richard Birkelandsvei 2B, N-7491 Trondheim, Norway
2 PGI-1, FZ Jülich - 52428 Jülich, Germany
3 Leibniz Institute for Polymer Research Dresden - P.O. Box 120 411, D-01005 Dresden, Germany
Received: 22 September 2017
Accepted: 9 January 2018
We have studied how the adhesion between rubber and a flat countersurface depends on temperature. When the two solids are separated at room temperature negligible adhesion is detected, which is due to the elastic deformation energy stored in the rubber, which is given back during pull-off and help to break the adhesive bonds. When the system is cooled down below the glass transition temperature, the elastic deformation imposed on the system at room temperature is “frozen-in” and the stored-up elastic energy is not given back during separation at the low temperature. This results in a huge increase in the pull-off force. This study is crucial for many applications involving rubber at low temperatures, e.g., rubber seals for cryogenic or space applications.
PACS: 68.35.Np – Adhesion / 68.35.bm – Polymers, organics
© EPLA, 2018
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