Temperature-controlled sequence engineering of polar cyclic olefin copolymers

IF 6.3 2区化学 Q1 POLYMER SCIENCE

European Polymer Journal Pub Date : 2025-09-24 DOI:10.1016/j.eurpolymj.2025.114314

Hyewon Jung , Kang Hee Ku , Jin Young Seo , Sang-Ho Lee

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Abstract

Sequence regulation in polymeric materials plays a critical role in tailoring their macroscopic properties, yet achieving precise sequence control in polar cyclic olefin copolymers (COCs) remains a significant challenge. In this study, we report a temperature-programmed Pd-catalyzed terpolymerization of norbornene (NB), butyl-norbornene (BuNB), and methyl vinyl ketone (MVK), enabling the formation of distinct copolymer sequences from a single monomer feed. By modulating polymerization temperature, we access either gradient-type (NBM5-G) or gradient-block-like (NBM5-GB) architectures, reflecting a shift in monomer incorporation kinetics. These sequence modulation translates into markedly different thermomechanical and optical properties: NBM5-G exhibits superior transparency and flexibility, whereas NBM5-GB displays higher stiffness and reduced transparency due to increased polar-polar interactions. Our findings establish temperature-directed sequence programming as an effective tool for tailoring functional COCs, opening avenues for advanced applications in flexible optics and electronics.

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极性环烯烃共聚物的温控序列工程

高分子材料的序列调控在调整其宏观性能方面起着至关重要的作用，但在极性环烯烃共聚物（COCs）中实现精确的序列控制仍然是一个重大挑战。在这项研究中，我们报道了一种温度编程的pd催化降冰片烯（NB），丁基降冰片烯（BuNB）和甲基乙烯酮（MVK）的三元聚合，使单个单体原料形成不同的共聚物序列。通过调节聚合温度，我们获得了梯度型（NBM5-G）或梯度块状（NBM5-GB）结构，反映了单体掺入动力学的转变。这些序列调制转化为明显不同的热机械和光学性质：NBM5-G具有优越的透明度和灵活性，而NBM5-GB由于极性相互作用增加而具有更高的刚度和透明度降低。我们的研究结果建立了温度导向序列编程作为定制功能COCs的有效工具，为柔性光学和电子学的先进应用开辟了道路。

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来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.