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Updated: Oct 22, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Modular Control of Glass Transition and Transparency in ROMP-Derived Oxanorbornene Polymers
Huigyung Kim1, Sang-Ho Lee2, Hyeonuk Yeo3,4,5
1Department of Chemistry, , , Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu41566, Republic of Korea.
Abstract:
Achieving both high optical transparency and high glass-transition temperature (Tg) remains challenging in cyclic olefin polymers. Here, ring-opening metathesis polymerization (ROMP)-derived oxanorbornene polymers enable modular tuning of these competing properties through imide N-substitution and comonomer architecture. P-OCy exhibited a Tg of 224.5 °C with 94.9% transmittance at 400 nm. Flexible ester comonomers improved transparency but reduced Tg to 121.1-146.4 °C, whereas rigid MMETCD preserved Tg near 210 °C while increasing P-OPh transmittance from 61.0% to 90.0%. These systematic comparisons reveal distinct structural contributions to thermal rigidity and optical clarity, establishing practical design guidelines for transparent, high-Tg oxanorbornene polymers.
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