A new approach for the near‐infrared (NIR)‐induced free‐radical photopolymerization of (meth)acrylate‐based polymers through the use of charge transfer complex (CTC) is proposed. This challenging strategy is based on near‐infrared sensitizers (e.g., cyanines) which act as very efficient heat generator (heater) upon NIR irradiation, allowing the activation of CTC in situ formed between an electron rich N‐aromatic amine and an iodonium salt used as an electron acceptor. The thermal ability of the different systems to initiate a polymerization upon thermal activation has been investigated by differential scanning calorimetry and their behaviors upon NIR irradiation have been examined by thermal imaging experiments. The role of cyanines has also been highlighted by spectrophotometry as well as Fourier transform infrared spectrometry. Finally, to highlight the huge potential of the proposed approach, these systems have been tested on glass and carbon fibers prepregs to the composite's development.

中文翻译：

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电荷转移配合物的近红外诱导光热分解：引发热聚合的新方法

提出了一种通过使用电荷转移络合物（CTC）进行近红外（NIR）诱导的（甲基）丙烯酸酯基聚合物自由基光聚合的新方法。这种具有挑战性的策略是基于近红外敏化剂（例如花青素），它们在NIR照射下充当非常高效的发热器（加热器），从而可以激活富含电子的N之间原位形成的CTC 。-芳族胺和碘鎓盐用作电子受体。已通过差示扫描量热法研究了不同体系在热活化后引发聚合反应的热能力，并已通过热成像实验研究了它们在近红外辐射下的行为。在分光光度法和傅立叶变换红外光谱法中，花青素的作用也得到了强调。最后，为了突出所提出方法的巨大潜力，这些系统已经在玻璃和碳纤维预浸料上进行了测试，以开发复合材料。