Abstract
AbstractA 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.
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