Abstract
Purchase PDF (569 K)
E-mail Article
Add to my Quick Links
Cited By in Scopus (0)
Purchase PDF (503 K)
doi:10.1016/j.ijadhadh.2006.09.014 
Published by Elsevier Ltd.
Multi-layer in-situ for evaluation of dynamic mechanical properties of pressure sensitive adhesives
Accepted 25 September 2006.
References and further reading may be available for this article. To view references and further reading you must purchase this article.
Abstract
A multi-layer, lap-shear geometry has been developed as a reliable testing method for evaluation of the dynamic mechanical properties of polyacrylic pressure-sensitive adhesives (PSA) for postage stamp applications. In-situ tests of four different PSA samples constructed by laminating, water-based polyacrylic PSAs to the face paper used for stamps were carried out with a dynamic mechanical analyzer (DMA) over a temperature range from −50 to 60 °C at frequencies of 0.1, 1, 10, and 100 Hz. This geometry utilizes the tension mode on the DMA, but the results were converted to shear properties of the PSA layers in the laminate. The effect of the specimen thickness (2–10 layers) on the dynamic mechanical properties was studied and the results suggest that a multi-layer geometry with 5–10 layers can be an appropriate structure to produce enhanced responses. Therefore, a geometry with 8-layer laminates was used for frequency sweep/isothermal temperature and for frequency sweep/temperature step tests. The results showed three relaxation responses: glassy, transition, and flow regions with respect to the frequency and temperature. The tensile properties of the face papers were also tested under the same conditions as those of the multi-layer geometry. Significant differences were found between the shear behaviors of the multi-layer geometry and the tensile behaviors of the face paper alone. This suggests that the tensile deformation of the face paper in the multi-layer geometry can be ignored as it did not contribute to the shear behaviors of the PSA layers. Master curves were produced by time–temperature superposition with a reference temperature of 23 °C. They can be used to predict the long- and short-term performance of these samples.
Keywords: Viscoelasticity; Pressure-sensitive adhesive; Postage stamp; Multilayer lap-shear; Time–temperature superposition
Article Outline
- 1. Introduction
- 2. Experimental approach
- 2.1. Materials
- 3. Test geometry (multiple layers of lap-shear geometry) for DMA
- 4. Dynamic mechanical analysis results
- 4.1. Effects of PSA thickness on dynamic mechanical responses
- 4.2. Frequency sweep/isothermal temperature
- 4.3. Temperature step/frequency sweep tests
- 4.4. Time–temperature superposition
- 5. Conclusions
- Acknowledgements
- References
