Synthesis and properties of cyclic olefin polymers by ring-opening metathesis (co)polymerization (ROMP) of ester-substituted norbornene and anthracene-based norbornene
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Cyclic olefin (co)polymers (COP)s are prepared by ROMP and subsequent hydrogenation reaction. They are obtained as amorphous with high glass transition temperature (Tg), thermal stability and transparency so that can be applied in high performance polymeric materials used for optic and medical devices. Herein, the COPs based on cyclic norbornene derivatives, MMETCD and HBMNwere were synthesized by ROMP using a Grubb’s 2nd generation catalyst and following hydrogenation. The randomness of the polymer structure as well as transparency were also improved by preparing these COPs as a three-dimensional structure via core-first ROMP. The chemical structure, monomer composition, and molecular weight of the series of COPs were investigated by NMR and GPC analysis. Resulting copolymers presented high Tg (>170 ⁰C) and their films showed high transmittance (>90%).