太阳能电池组件用POE封装胶膜的研制

Study on preparing POE encapsulation adhesive film for solar cell module

以乙烯-α-烯烃共聚物(POE)为基体、过氧化-2-乙基己酯碳酸叔丁酯为交联剂、三烯丙基异氰脲酸酯为助交联剂、乙烯基三甲氧基硅烷为硅烷偶联剂、马来酸酐(MAH)为改性剂,采用熔融挤出法制得母粒,再采用流延成膜法制备了纯POE胶膜(S1)、MAH改性POE胶膜(S2)和硅烷偶联剂改性POE胶膜(S3)。研究结果表明:S3的交联度(66%)、透光率(89%)、粘接性能(与玻璃、TPT膜的剥离强度分别为130、86 N/cm)和耐湿热老化性能(85℃、相对湿度85%时老化1 000 h后黄变指数变化1.1%、与玻璃的剥离强度降幅15%)相对最好,由S3封装的太阳能电池组件之功率衰减(为5.2%)明显低于传统EVA(乙烯-醋酸乙烯酯共聚物)胶膜封装的太阳能电池组件,有利于改善光伏电站的运营效益。

Firstly, the master batches were made by melt extrusion method, then the pure POE（ethylene-α-olefin copolymer） film （ S 1 ）, MAH （ maleic anhydride ） modified POE film （S2） and silane coupler modified POE film （S3 ） were further prepared by casting film-forming method when POE was used as matrix, peroxide-2-ethyl hexa-ester tert-butyl carbonate was used as crosslinker, triallyl isocyanurate was used as assistant crosslinker, vinyl trimethoxy silane was used as silane coupler, and MAH was used as modifier. The research results showed that the S3 can improwe the operation benefit of photovoltaie power station because the S3 had the relatively optimal crosslinking degree（66% ）, light transmittance（89% ）, bonding properties （peeling strengths between S3 and glass, S3 and TPT film at 130,86 N/cm respectively ） and wet-heat aging resistance（yellowing index change at 1. 1% after aging 1 000 h at 85℃ and relative humidity 85%, and the decreasing amplitude of peeling strength betwee S3 and glass at 15% ）, The power damping （5.2%） of solar cell module encapsulated by S3 was obviously less than that by traditional EVA（ethylene-vinyl acetate copolymer） film.