Study of the Application of Polyolefin Elastomer (POE) Grafted Silane Coupling Agent in Photovoltaic Encapsulation Adhesive Film

POE-g-KH-171 was prepared by twin-screw melt extrusion method, and the differences in the properties of POE-g-KH-171 prepared by using polyolefin elastomer (POE) as the substrate, different contents of DBPH, and different contents of coupling agent were explored. The grafting products were characterized qualitatively by Fourier infrared (FT-IR) spectroscopy, and the graft ratio and grafting efficiency of the products were determined. The performance of the adhesive was analyzed by a 180° peel strength test. The optimal content of vulcanizing agent was found to be 0.25, with the content of silane coupling agent KH-171 being 4. This composition achieved a graft ratio of 3.4, a grafting efficiency of 0.85, and a melt flow index of 12.98 g/10 min; the adhesion performance was excellent. The mobility of the product that was created with the optimum ratio of materials was then tested, followed by a comparative analysis with POE. The modified material (POE-g-KH-171) showed better performance than regular POE. Besides, POE-g- KH-171 had similar properties with ethylene-vinyl acetate (EVA) materials. This modified material is expected to mature in the future, contributing to the advancement of photovoltaic encapsulation technology.

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