Design of Gradient Cyclic Olefin Copolymers with High Heat Resistance and Highly Tunable Processability toward Circular Economy
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초록
내용
Cyclic olefin copolymer (COC) is representative example for the display and optical applications due to superior properties such as highly transparent and high thermal stability. Generally, COC can be prepared by vinyl addition polymerization between cyclic olefin and a-olefin. In addition, the introduction of functional group in the COC chains has limited due to catalytic tolerance or was mostly limited to functionalization of cyclic monomer. In this study, we present the COC carrying polar functional group at a-olefin position, which provides gradient sequence between cyclic monomer and functional a-olefin monomer. Furthermore, the quantitative post-polymerization modifications were successfully performed through sequential hydrosilylation and hydrolysis to verify the applicability of obtained COCs toward circular economy. The structural analysis of obtained COCs were performed by NMR, FT-IR and SEC. Moreover, the thermal properties of obtained COCs were confirmed by TGA and DSC.