(181bi) Controlled Synthesis of Polyolefin Copolymers with Rapid Curability for Photovoltaic Cell Encapsulation
In this study, we address the problem through a polymer product engineering approach by controllably introducing pedant vinyl groups into ethylene-octene copolymers via terpolymerization of ethylene, octane-1, and an asymmetric diene. The vinyl functionalities are ready to react with crosslinking agents, which distinctly increases the PO curing rate measured by storage modulus (Gâ). We are able to precisely tune the vinyl content in the POs from 0 to 4.01 mol% through engineering the polymerization processes. Moreover, under the same crosslinking reaction condition, Gâ was significantly increased from 11294 pa to 57090 pa. Interestingly, we also observed that the crosslinking reaction was beneficial to the product transparency and volume resistivity, and did not affect the damp-heat and UV aging performances of the resulting PO films.