Design and Synthesis of Colorless Cyclic Olefin Polymers with High Refractive Index, Transparency, and Thermal Stability

IF 5.2 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-08-21 DOI:10.1021/acs.macromol.5c01567

Weizhong Li, Yingli Ding, Huan Gao, Li Pan* and Yuesheng Li*,

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引用次数: 0

Abstract

High-refractive-index polymers are critical materials for optical applications. Cyclic olefin polymers (COPs) are among the most promising optical materials, but achieving high refractive indexes remains challenging. In this study, a series of high-refractive-index COPs was synthesized via ring-opening metathesis polymerization and subsequent hydrogenation, using three carbazole-based monomers (HM1–HM3), with HM2 and HM3 featuring naphthalene-fused structures. The resulting polymers exhibited high refractive indices (up to 1.697), Abbe numbers of 14.5–25.2, superior optical transparency (>90%), excellent thermal and processing stability (glass transition temperature: 140–180 °C; T_d5% > 400 °C), and low water absorption (<0.01%). Density functional theory (DFT) calculations and X-ray diffraction (XRD) analysis revealed that both molecular polarizability and chain packing contribute to the enhancement of refractive index. This study first incorporates carbazole–naphthalene-fused units into high-refractive-index polymers, offering a novel design strategy for optical materials.

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具有高折射率、透明度和热稳定性的无色环状烯烃聚合物的设计与合成

高折射率聚合物是光学应用的关键材料。环烯烃聚合物（cop）是最有前途的光学材料之一，但实现高折射率仍然具有挑战性。本研究以三种咔唑基单体（HM1-HM3）为原料，HM2和HM3具有萘熔接结构，通过开环复分解聚合和加氢合成了一系列高折射率cop。所得聚合物具有高折射率（高达1.697），阿贝数为14.5-25.2，优越的光学透明度（>90%），优异的热稳定性和加工稳定性（玻璃化转变温度：140-180 °C； Td5% > 400 °C）和低吸水率（<0.01%）。密度泛函理论（DFT）计算和x射线衍射（XRD）分析表明，分子极化率和链填充都有助于提高折射率。本研究首次将咔唑-萘熔合单元整合到高折射率聚合物中，为光学材料的设计提供了一种新的策略。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.