The thermo-mechanical degradation of ethylene vinyl acetate used as a solar panel adhesive and encapsulant

The thermal ageing of an ethylene-vinyl acetate (EVA) polymer used as an adhesive and encapsulant in a photovoltaic module has been investigated. The EVA is used to bond the silicon solar cells to the front glass and backing sheet and to protect the photovoltaic materials from the environment and me...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2016-07, Vol.68, p.212-218
Main Authors: Badiee, A., Ashcroft, I.A., Wildman, R.D.
Format: Article
Language:English
Subjects:
Adhesive bonding
Ageing
Aging
Durability
Dynamic Mechanical Analysis
Encapsulation
Ethylene vinyl acetates
Mechanical analysis
Panels
Photovoltaic cells
Photovoltaic encapsulants
Solar cells
Thermal analysis
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Summary:The thermal ageing of an ethylene-vinyl acetate (EVA) polymer used as an adhesive and encapsulant in a photovoltaic module has been investigated. The EVA is used to bond the silicon solar cells to the front glass and backing sheet and to protect the photovoltaic materials from the environment and mechanical damage. Using a range of experimental techniques, including Dynamic Mechanical Analysis, Differential Scanning Calorimetry and Thermo-gravimetric Analysis, it was possible to show a link between changes in mechanical properties with both the transient temperature and the degree of long-time thermal ageing. Importantly, it was possible to show that the ageing related property changes were likely due to long term structural changes rather than any modification of the chemistry of the material.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2016.03.008