New perspectives in polymer adhesion mechanisms--importance of diffusion and molecular bonding in adhesion

Lieng-Huang Lee

doi:10.1117/12.158592

27 September 1993 New perspectives in polymer adhesion mechanisms--importance of diffusion and molecular bonding in adhesion

Lieng-Huang Lee

Author Affiliations +

Proceedings Volume 1999, Adhesives Engineering; (1993) https://doi.org/10.1117/12.158592
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

This paper reviews new perspectives in polymer adhesion mechanisms. Both reptation theory and related experiments have demonstrated the existence of either self-diffusion or interdiffusion of rubbery polymers at the interfaces. Thus, adhesive strength, green strength, and tack of elastomeric adhesives can be at least partially explained on the basis of the diffusion mechanism. Besides diffusion, the adsorption mechanism plays a major role in achieving molecular contact. Without molecular contact, polymer molecules can not attain adequate diffusion or physical adsorption at the interface through van der Waals attraction. When the molecular distance is less than 4 angstroms, chemisorption can take place due to molecular interaction. Thus, both physisorption and chemisorption are important in enhancing adhesion. In addition to the above mechanisms, we shall mention briefly the mechanisms of mechanical interlocking, chemical bonding, and electronic adhesion.

Citation Download Citation

Lieng-Huang Lee "New perspectives in polymer adhesion mechanisms--importance of diffusion and molecular bonding in adhesion", Proc. SPIE 1999, Adhesives Engineering, (27 September 1993); https://doi.org/10.1117/12.158592

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