PVSAT-13_182_JiangZhu.pdf (320.7 kB)

Water vapour transmission rate of Ethylene Vinyl Acetate (EVA): Encapsulant with different curing levels

Download (320.7 kB)
conference contribution
posted on 09.04.2018 by Jiang Zhu, Christina Ng, Daniel Montiel-Chicharro, Tom Betts, Ralph Gottschalg
Water vapour transmission rate of EVA sheets with different curing levels is investigated under a various temperature and relative humidity levels. The gravimetric cup method is used to measure the transmission rate. EVA samples’ thermal and structural properties are measured and results confirm that the curing level does not affect material VAc contents or crystallinity, though their degrees of crosslinking are significantly different. For the EVA studied in this work, lower degrees of crosslinking (gel content <60%) show water transmission rate at about 35 g/m2/day under 23°C and 1 bar. The transmission rate reduces with the increasing crosslinking degree and reaches about 10 g/m2/day for samples of gel content >80%. Results also show the water transmission is able to be accelerated by temperature with an activation energy of about 7.5kJ/mol.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

13 PVSAT

Citation

ZHU, J. ...et al., 2017. Water vapour transmission rate of Ethylene Vinyl Acetate (EVA):Encapsulant with different curing levels. Presented at the 13th Photovoltaic Science, Application and Technology Conference, (PVSAT-13), Bangor University, 5-7th April.

Publisher

© The Solar Energy Society

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

07/04/2017

Publication date

2017

Notes

This is a conference paper.

ISBN

0904963837

Publisher version

Language

en

Location

Bangor

Exports

Logo branding

Keyword(s)

Exports