TAILIEUCHUNG - Curing treatment of ethylene vinyl acetate used for solar module

This paper will present and discuss heat treatment of EVA and the extent to which EVA is cured (gel content) using heat treatment, and its correlation to solubility and differential scanning calorimeter (DSC) curves. Based on the correlation between the DSC and solubility techniques performed on a given EVA, the treatment needed to obtain sufficient curing can be deduced. | JOURNAL OF SCIENCE OF HNUE Chemical and Biological Sci. 2014 Vol. 59 No. 9 pp. 51-58 This paper is available online at http CURING TREATMENT OF ETHYLENE VINYL ACETATE USED FOR SOLAR MODULE Nguyen Thuy Linh2 Nguyen Truong Minh3 Nguyen Trong Tung1 Nguyen Duc Thien1 and Duong Ngoc Huyen1 1 School of Engineering Physics Hanoi University of Science and Technology 2 Faculty of Engineering and Technology Pham Van Dong University Quang Ngai 3 Institute for Industrial Policies amp Strategies Hanoi Abstract. Ethylene vinyl acetate EVA is commonly used as the encapsulant in the manufacture of solar modules. To withstand harsh environmental conditions EVA must be cured in properly thermal treatment. This paper will present and discuss heat treatment of EVA and the extent to which EVA is cured gel content using heat treatment and its correlation to solubility and differential scanning calorimeter DSC curves. Based on the correlation between the DSC and solubility techniques performed on a given EVA the treatment needed to obtain sufficient curing can be deduced. EVA must be at least 80 cured to be acceptable for making solar modules thermal treatment in the curing of EVA JCC 105 must be done at 140 - 150 C with a curing time of 10 - 20 minutes. Keywords EVA curing laminator solar module. 1. Introduction Solar cells fabricated from inorganic semiconductors as Si or CIGS are normally in the form of fragile planar wafers or thin films which are easily broken by mechanical impact. In addition solar cells are affected by variety of physical and chemical agents in the open environment 6 . These impacts can damage or deteriorate solar cells. In order to protect solar cells from environmental impacts over a long period of time encapsulating and packing solar cells in solar modules with specific materials is essential. Besides protecting solar cells in severe weather conditions the encapsulating materials must also allow passage of solar radiation in a large range of .

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