The effect of polyethylene glycoldiacrylate complexation on type II photoinitiator and promotion for visible light initiation system

Li, Jingfang; Zhang, Xin; Ali, Safdar; Akram, Muhammad Yasir; Nie, Jun; Zhu, Xiaoqun

doi:10.1016/j.jphotochem.2019.112037

Cited by 52 publications

(22 citation statements)

References 15 publications

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“…And usually, the photopolymerization reaction can be initiated by the type I (mono-component initiating system) or type II (bi-component or multiple-component initiating system) photoinitiators, of which the latter is especially versatile. [1][2][3][4][5] Thanks to these intrinsic advantages, such as fast polymerization kinetics, mild reaction conditions, environmentally friendly polymerization process, its economic aspect with less energy consumed, as well as an excellent spatial and temporal control, photopolymerization reactions have been widely studied and developed over the past decades. Now, the photopolymerization technique is attracting a widespread attention in both traditional and high-tech areas, including coatings, paints, inks, adhesives, microlithography, microelectronics, dentistry, and photocuring 3D-printing…to name just a few.…”

Section: Introductionmentioning

confidence: 99%

Novel ketone derivative-based photoinitiating systems for free radical polymerization under mild conditions and 3D printing

Noirbent

Brunel

et al. 2020

Polym. Chem.

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Section: Introductionmentioning

confidence: 99%

Novel ketone derivative-based photoinitiating systems for free radical polymerization under mild conditions and 3D printing

Noirbent

Brunel

et al. 2020

Polym. Chem.

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“…Like our previous works, [16][17][18] D-π-A-π-D molecule BBFC were synthesized through one-step Claisen-Schmidt reaction successfully. According to our pre-design, this new molecule BBFC would have longer wavelength of absorption than that of BFC for the introduction into the benzene ring, the bigger conjugation is formed.…”

Section: Resultsmentioning

confidence: 95%

Synthesis of D‐π‐A‐π‐D photoinitiator with high‐photoinitiation efficiency by restricting photoinduced isomerization process

Zhu

2021

J of Applied Polymer Sci

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In this work, we designed a new D-π-A-π-D LED photoinitiator BBFC with high molar excitation coefficient and photoinitiation efficiency based on the principle of inhibition of photoisomerization. Via introduction of benzene ring on the BFC, which we have reported before, the absorption wavelength, molar excitation coefficient and photoinitiation efficiency of BBFC were greatly improved. The characterization and theoretical calculation proved BBFC has no photoisomerization, for the change of the configuration of BBFC requiring high energy due to the steric effect. BBFC has higher initiation efficiency than that of commercial photoinitiator ITX with little content under air condition. This might have potential to design new D-π-A-π-D molecules with high-photoinitiation efficiency and contribute the field of photo polymerization.

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“…This results indicating the photolysis process taking place. Moreover, the absorption band located at around 360 nm was rapidly blue shifted without isosbestic point [ 31 ]. On the other hand, the BPDP-D/TEA package showed insignificant UV spectral change after irradiation.…”

Section: Resultsmentioning

confidence: 99%

Ketone Number and Substitution Effect of Benzophenone Derivatives on the Free Radical Photopolymerization of Visible-Light Type-II Photoinitiators

Huang

Chen

2021

Polymers

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Three novel visible-light absorbing benzophenone-based hydrogen acceptors (BPD-D, BPDM-D and BPDP-D) were designed on the basis of a donor–benzophenone–donor structural backbone. Mono or diketone units and double diphenylamine electron-donating groups in para-or meta-positions were introduced to comprehend the electronic and structural effects on free radical photopolymerization (FRPP). Such a structural change leads not only to a red-shift of the absorption maxima but strongly enhances their molar extinction coefficients compared to the commercial phototinitiators such as benzophenone (BP) and 4,4′-bis(diethylamino) benzophenone (EMK). In addition, excellent melting points and thermal decomposition temperatures were achieved for those novel compounds. Further, the photochemical reaction behavior was studied by cyclic voltammograms (CV), photolysis and electron spin resonance (ESR) spectroscopy. Finally, benzophenone derivatives in combination with an amine (TEA, triethylamine) as a co-initiator were prepared and initiated the FRPP of trimethylolpropane trimethacrylate (TMPTMA) using a UV lamp as a light source. When used in stoichiometric amounts, the BPDP-D/TEA had the best double bond conversion efficiency among all the compounds studied, and were even superior to the reference compounds of BP/TEA and EMK/TEA. The results and conclusions could provide the fundamental rules applicable for the structural design of benzophenone derivative-based photoinitiators.

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The effect of polyethylene glycoldiacrylate complexation on type II photoinitiator and promotion for visible light initiation system

Cited by 52 publications

References 15 publications

Novel ketone derivative-based photoinitiating systems for free radical polymerization under mild conditions and 3D printing

Novel ketone derivative-based photoinitiating systems for free radical polymerization under mild conditions and 3D printing

Synthesis of D‐π‐A‐π‐D photoinitiator with high‐photoinitiation efficiency by restricting photoinduced isomerization process

Ketone Number and Substitution Effect of Benzophenone Derivatives on the Free Radical Photopolymerization of Visible-Light Type-II Photoinitiators

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