Journal
MATERIALS
Volume 15, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/ma15093294
Keywords
peel testing; flexible laminates; photovoltaic backsheets
Categories
Funding
- Federal Ministry for Digital and Economic Affairs - Austrian Government
- FFG project [879785]
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This paper presents a practical peel test set-up that overcomes the issues of standard peel tests and provides more accurate results by avoiding the influence of sample geometry and energy dissipation.
Delamination is one of the most critical failure modes of a PV module during service lifetime. Delamination within a backsheet primarily imposes a safety risk, but may also accelerate various other PV module degradation modes. The main aim of this paper is to present a peel test set-up, which is more practical in sample preparation and execution than the width-tapered cantilever beam test and overcomes some issues of standard peel tests like the influence of sample geometry and energy dissipation through deformation on the peel test results. The best results with respect to accuracy and effort were achieved by using a 180 degrees peel geometry where an additional adhesive tape is applied to the peel arm in order to avoid plastic deformation or breakage. The additional support of the adhesive tape leads to comparable peel strength values without any influence of the plastic deformation behavior of the peel arms with different thickness.
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