Method for preparing ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer and application thereof

The invention relates to the field of high polymer materials, and discloses a method for preparing an ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate copolymer and application of the ethylene-vinyl acetate copolymer. The method comprises the following steps: (1) in the presence of organic peroxide, carrying out polymerization reaction on ethylene and vinyl acetate in a loop tubular reactor to obtain a melt I; and (2) carrying out melt blending granulation on the melt I and an antioxidant in a twin-screw extruder to obtain the ethylene-vinyl acetate copolymer. The ethylene-vinyl acetate copolymer prepared by adopting the method provided by the invention has relatively high transmittance, relatively high volume resistivity, relatively few crystal points, relatively low yellow index and excellent mechanical properties, and can meet the performance requirements of a photovoltaic adhesive film. 本发明涉及高分子材料领域，公开了一种制备乙烯-醋酸乙烯酯共聚物的方法、乙烯-醋酸乙烯酯共聚物及其应用。该方法包括：(1)在有机过氧化物的存在下，将乙烯与醋酸乙烯酯在环管式反应器中进行聚合反应，得到熔体I；(2)将所述