Subcritical failure of soft acrylic adhesives under tensile stress

Bibliographische Detailangaben
Veröffentlicht in:	Langmuir : the ACS journal of surfaces and colloids. - 1992. - 20(2004), 21 vom: 12. Okt., Seite 9156-69
1. Verfasser:	Lindner, A (VerfasserIn)
Weitere Verfasser:	Maevis, T, Brummer, R, Lühmann, B, Creton, C
Format:	Aufsatz
Sprache:	English
Veröffentlicht:	2004
Zugriff auf das übergeordnete Werk:	Langmuir : the ACS journal of surfaces and colloids
Schlagworte:	Comparative Study Journal Article Research Support, Non-U.S. Gov't Acrylates Adhesives

Beschreibung
Zusammenfassung:	Copyright 2004 American Chemical Society The mechanisms of failure over time of a series of model acrylic pressure-sensitive adhesives under a moderate level of stress has been investigated with a probe method. Two competing mechanisms of failure have been observed: a progressive nucleation of cavities under stress and the propagation of existing cavities at the interface between the probe and the adhesive layer. Homogeneous creep of the adhesive was never observed as the only failure mechanism. In situations where the resistance to crack propagation was good relative to the resistance to cavitation, extensive nucleation of cavities was observed until a material-dependent and stable value of stress was achieved. On the other hand in situations were the resistance to crack propagation was weak, propagation led invariably to a complete failure of the adhesive bond. In addition to the stress relaxation, the energy dissipation was studied allowing to distinguish the different adhesives even further. This allowed determination of the optimal amount of a comonomer (acrylic acid) that had to be added to improve the long-term resistance of the adhesives under study. Further more we investigate the compliance of the confined adhesive layers and compare the obtained results to predictions from theoretical models
Beschreibung:	Date Completed 25.04.2006 Date Revised 15.11.2006 published: Print Citation Status MEDLINE
ISSN:	1520-5827