The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Frédéric Dumur - One of the best experts on this subject based on the ideXlab platform.
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Near‐infrared ‐induced photothermal decomposition of charge transfer complexes: A new way to initiate thermal polymerization
Journal of Polymer Science, 2020Co-Authors: Aurore Caron, Frédéric Dumur, Jacques LaleveeAbstract:A new approach for the Near-Infrared induced free radical photopolymerisation (FRP) 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 (DSC) 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 (FTIR) spectrometry. Finally, to highlight the huge potential of the proposed approach, these systems have been tested on glass and carbon fibres prepregs to the composite's development.
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photoinduced thermal polymerization reactions
Macromolecules, 2018Co-Authors: Audeheloise Bonardi, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Frédéric Dumur, Fabrice Morletsavary, Jean-pierre Fouassier, Benoit H LessardAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near-infrared (NIR) dye combined with a thermal initiator is presented. The dye acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantages: it is safer than shorter wavelength, and it ...
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Photoinduced Thermal Polymerization Reactions
Macromolecules, 2018Co-Authors: D. Gigmes, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Jean-pierre Fouassier, J. Lalevee, A.-h. Bonardi, F. Morlet-savary, Frédéric DumurAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near- acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. infrared (NIR) dye combined with a thermal initiator is presented. The dye Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantage s: it is safer than shorter wavelength, and it allows a deeper penetration of the light and therefore a better curing of filled samples for a unique access to composites. Systems using a cyanine borate as a dye give high conversion rate of C=C for methacrylate monomer under air. Two wavelengths of irradiation are studied: 785 and 850 nm. The presence of additives (phosphines or iodonium salts) can also improve the polymerization profiles.
Jean-pierre Fouassier - One of the best experts on this subject based on the ideXlab platform.
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photoinduced thermal polymerization reactions
Macromolecules, 2018Co-Authors: Audeheloise Bonardi, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Frédéric Dumur, Fabrice Morletsavary, Jean-pierre Fouassier, Benoit H LessardAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near-infrared (NIR) dye combined with a thermal initiator is presented. The dye acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantages: it is safer than shorter wavelength, and it ...
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Photoinduced Thermal Polymerization Reactions
Macromolecules, 2018Co-Authors: D. Gigmes, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Jean-pierre Fouassier, J. Lalevee, A.-h. Bonardi, F. Morlet-savary, Frédéric DumurAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near- acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. infrared (NIR) dye combined with a thermal initiator is presented. The dye Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantage s: it is safer than shorter wavelength, and it allows a deeper penetration of the light and therefore a better curing of filled samples for a unique access to composites. Systems using a cyanine borate as a dye give high conversion rate of C=C for methacrylate monomer under air. Two wavelengths of irradiation are studied: 785 and 850 nm. The presence of additives (phosphines or iodonium salts) can also improve the polymerization profiles.
Benoit H Lessard - One of the best experts on this subject based on the ideXlab platform.
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photoinduced thermal polymerization reactions
Macromolecules, 2018Co-Authors: Audeheloise Bonardi, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Frédéric Dumur, Fabrice Morletsavary, Jean-pierre Fouassier, Benoit H LessardAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near-infrared (NIR) dye combined with a thermal initiator is presented. The dye acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantages: it is safer than shorter wavelength, and it ...
Celine Dietlin - One of the best experts on this subject based on the ideXlab platform.
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photoinduced thermal polymerization reactions
Macromolecules, 2018Co-Authors: Audeheloise Bonardi, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Frédéric Dumur, Fabrice Morletsavary, Jean-pierre Fouassier, Benoit H LessardAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near-infrared (NIR) dye combined with a thermal initiator is presented. The dye acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantages: it is safer than shorter wavelength, and it ...
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Photoinduced Thermal Polymerization Reactions
Macromolecules, 2018Co-Authors: D. Gigmes, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Jean-pierre Fouassier, J. Lalevee, A.-h. Bonardi, F. Morlet-savary, Frédéric DumurAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near- acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. infrared (NIR) dye combined with a thermal initiator is presented. The dye Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantage s: it is safer than shorter wavelength, and it allows a deeper penetration of the light and therefore a better curing of filled samples for a unique access to composites. Systems using a cyanine borate as a dye give high conversion rate of C=C for methacrylate monomer under air. Two wavelengths of irradiation are studied: 785 and 850 nm. The presence of additives (phosphines or iodonium salts) can also improve the polymerization profiles.
Fabien Bonardi - One of the best experts on this subject based on the ideXlab platform.
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photoinduced thermal polymerization reactions
Macromolecules, 2018Co-Authors: Audeheloise Bonardi, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Frédéric Dumur, Fabrice Morletsavary, Jean-pierre Fouassier, Benoit H LessardAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near-infrared (NIR) dye combined with a thermal initiator is presented. The dye acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantages: it is safer than shorter wavelength, and it ...
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Photoinduced Thermal Polymerization Reactions
Macromolecules, 2018Co-Authors: D. Gigmes, Fabien Bonardi, Celine Dietlin, Guillaume Noirbent, Trevor M Grant, Jean-pierre Fouassier, J. Lalevee, A.-h. Bonardi, F. Morlet-savary, Frédéric DumurAbstract:The combination of thermally induced and photoinduced free radical polymerization of (meth)acrylic monomers has only been scarcely presented in the literature. In this study, a two-component system with a near- acts as a very efficient Heat Generator (Heater) upon irradiation with NIR light. infrared (NIR) dye combined with a thermal initiator is presented. The dye Several thermal initiators are presented such as an alkoxyamine (e.g., BlocBuilder-MA), azo derivatives, and (hydro)peroxides. The Heat delivered by the dye dissociates the thermal initiator, which initiates the free radical polymerization of (meth)acrylates. Several types of Heat Generators are presented such as borate-based dyes and a silicon phthalocyanine derivative. For the first time, the effects of the NIR Heater concentration, light intensity, and monomer structure on the Heat released are studied using thermal imaging studies. NIR light curing is challenging but offers significant advantage s: it is safer than shorter wavelength, and it allows a deeper penetration of the light and therefore a better curing of filled samples for a unique access to composites. Systems using a cyanine borate as a dye give high conversion rate of C=C for methacrylate monomer under air. Two wavelengths of irradiation are studied: 785 and 850 nm. The presence of additives (phosphines or iodonium salts) can also improve the polymerization profiles.
