环氧/硫醇聚合中的近红外光热活化

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Chemistry Pub Date : 2025-06-19 DOI:10.1039/d5py00565e

Rania Rejeb, Philipert Lenormand, Didier Gigmes, Frederic Dumur, Michael Schmitt, Julien Pinaud, Jacques Lalevée

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引用次数: 0

摘要

环氧树脂因其机械强度、热稳定性和粘附性能而广泛应用于涂料和粘合剂中。近年来，巯基-环氧树脂“咔嗒”反应以其反应条件温和、效率高、氧不敏感等特点，成为光固化领域的重要途径。然而，传统的uv固化策略受渗透深度浅和潜在安全问题的限制。为了克服这些限制，我们探索了一种近红外（NIR）诱导的光热策略来触发环氧/硫醇多加成反应。本研究对不同的巯基交联剂和热引发剂进行了评价，以优化配方。通过实时傅里叶变换红外光谱（RT-FTIR）监测聚合动力学，并表征不同体系的光热效应，以评估产热和固化效率。这项研究强调了nir活化的硫醇-环氧树脂体系在先进材料应用中作为一种安全有效的深度快速固化替代方案的潜力。

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NIR Photothermal Activation in Epoxy/Thiol Polymerization

Epoxy resins are widely employed in coatings and adhesives due to their mechanical strength, thermal stability, and adhesion properties. In recent years, the thiol-epoxy “click” reaction has emerged as a prominent approach in the field of photocuring, offering mild reaction conditions, high efficiency, and oxygen insensitivity. However, conventional UV-curing strategies are limited by shallow penetration depths and potential safety concerns. To overcome these limitations, we explored a near-infrared (NIR)-induced photothermal strategy to trigger epoxy/thiol polyaddition reactions. In this work, various thiol-based crosslinkers and thermal initiators were evaluated to optimize the formulation. Polymerization kinetics were monitored via Real-Time Fourier Transform Infrared Spectroscopy (RT-FTIR), and the photothermal effect of the different systems was characterized to assess the heat generation and curing efficiency. This study highlights the potential of NIR-activated thiol-epoxy systems as a safe and effective alternative for deep and rapid curing in advanced material applications.

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来源期刊

Polymer Chemistry POLYMER SCIENCE-

CiteScore

8.60

自引率

8.70%

发文量

535

审稿时长

1.7 months

期刊介绍： Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.