PVSAT-13_182_JiangZhu.pdf (320.7 kB)
Water vapour transmission rate of Ethylene Vinyl Acetate (EVA): Encapsulant with different curing levels
conference contribution
posted on 2018-04-09, 13:46 authored by Jiang Zhu, Christina Ng, Daniel Montiel-Chicharro, Tom BettsTom Betts, Ralph GottschalgWater 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 PVSATCitation
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 SocietyVersion
- 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
2017-04-07Publication date
2017Notes
This is a conference paper.ISBN
0904963837Publisher version
Language
- en