Assessment of the cross-linking degree of EVA PV encapsulants

Published: January 20, 2014

By Manuel Hidalgo, Senior Research Scientist, Arkema, Sollia Laboratory at INES-LMPV; Dominque Thil, Arkema, Sollia Laboratory at INES-LMPV; Christophe Dugué, Process Engineer, Photowatt

This paper presents a comparison of different characterization methods used for determining the
relative degree of cross-linking of samples of PV-type EVA films, obtained under three different process conditions in a vacuum PV laminator. The methods investigated are gel content measurements, rheological measurements and differential scanning calorimetry (DSC). For the latter, two distinct procedures are employed – the residual enthalpy method and the melt/freeze method.

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