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首页> 外文期刊>Journal of Applied Polymer Science >Crosslinking and post-crosslinking of ethylene vinyl acetate in photovoltaic modules
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Crosslinking and post-crosslinking of ethylene vinyl acetate in photovoltaic modules

机译：光伏模块中乙烯乙烯酯的交联和交联

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Ethylene vinyl acetate (EVA) is the dominating material for the encapsulation of solar cells. A better understanding of the crosslinking reaction progress during PV module lamination could lead to promising approaches for shortening of PV module lamination times but also for optimization of the EVA formulation. Therefore, the main aim of this study is to investigate the crosslinking behavior of EVA but also for optimization potentials of the EVA formulation. Currently, a degree of crosslinking higher than 70% obtained from Soxhlet extraction, is used as quality control standard in PV industry. Thermomechanical properties of the investigated EVA films demonstrate a sufficient state of crosslinking already after 5 min, which corresponds to a Soxhlet value of around 50%. Nevertheless, the effect of the remaining, still reactive peroxide crosslinker under service relevant conditions cannot be neglected. Therefore, the behavior of mini-modules manufactured at different lamination times and stored under various aging conditions is investigated. EVA not fully cured during lamination are undergoing postlamination crosslinking. At the same time, remaining active crosslinker causes discoloration at soldering ribbons after accelerated aging. The crosslinking time in the lamination process may be reduced to 6 min, compromising between high throughput in production and the need of avoiding degradation. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44912.
机译：乙烯醋酸乙烯酯（EVA）是用于封装太阳能电池的主导材料。更好地理解光伏模块层压期间的交联反应进展可能导致缩短光伏模块层压时间的有希望的方法，而且用于优化EVA制剂。因此，本研究的主要目的是研究EVA的交联行为，而且还用于EVA配方的优化电位。目前，从Soxhlet萃取获得的高于70％的交联程度，用作PV工业中的质量控制标准。调查的EVA薄膜的热机械性质在5分钟后已经证明了已经过的交联状态，其对应于索氏值约为50％。然而，剩余的剩余活性过氧化物交联剂在服务相关条件下的作用不能被忽略。因此，研究了在不同层压时间和在各种老化条件下储存的迷你模块的行为。在层压期间没有完全固化的EVA正在接受汉语交联。同时，剩余的活性交联剂在加速老化后导致焊接丝带的变色。层压过程中的交联时间可以减少到6分钟，在生产中的高吞吐量之间损害以及避免劣化的需要。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2017,134,44912。

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