Rubber adhesion below the glass transition temperature: Role of frozen-in elastic deformation
Rubber adhesion below the glass transition temperature: Role of frozen-in elastic deformation
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DOI：
10.1209/0295-5075/120/36002
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
A. Akulichev;A. Tiwari;L. Dorogin;A. Echtermeyer;B. Persson
中科院分区：
文献类型：
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作者：
A. Akulichev;A. Tiwari;L. Dorogin;A. Echtermeyer;B. Persson
我们已经研究了橡胶与平的相对表面之间的粘附力如何随温度而变化。当两种固体在室温下分离时，检测到可忽略不计的粘附力，这是由于橡胶中储存的弹性变形能，该弹性变形能在拉脱期间返回并有助于破坏粘合剂结合。当系统被冷却到低于玻璃化转变温度时，在室温下施加在系统上的弹性变形被“冻结”，并且在低温下的分离期间，储存的弹性能量不会被释放。这导致拉脱力的巨大增加。这项研究对于许多涉及低温橡胶的应用至关重要，例如，用于低温或空间应用的橡胶密封件。
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.