Conjugated porous Polymers as Highly Efficient Heterogeneous Visible Light Photocatalyst

2015 ◽  
Vol 1784 ◽  
Author(s):  
Zi Jun Wang ◽  
Katharina Landfester ◽  
Kai A. I. Zhang
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Visible Light Irradiation ◽  
Porous Polymers ◽  
Visible Light Photocatalyst ◽  
Organic Sulfides ◽  
Internal Phase ◽  
Hierarchical Pore

ABSTRACTΠ-conjugated porous polymers with hierarchical pore structures were synthesized via high internal phase emulsion polymerization (polyHIPE) technique. The polymers could be used as heterogeneous photocatalysts for highly selective oxidation of organic sulfides into sulfoxides and the free radical polymerization of methyl methacrylate (MMA) under visible light irradiation.

scholarly journals Self-strengthening hybrid dental adhesive via visible-light irradiation triple polymerization

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52434-52447 ◽  
Author(s):  
Linyong Song ◽  
Qiang Ye ◽  
Xueping Ge ◽  
Anil Misra ◽  
Candan Tamerler ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Visible Light Irradiation ◽  
Cationic Polymerization ◽  
Sol Gel ◽  
Free Radical Polymerization ◽  
Light Irradiation ◽  
Dental Adhesive ◽  
Polymerization System

An integrated triple polymerization system containing free radical polymerization, cationic polymerization, and photoacid-induced sol–gel reaction was designed and successfully applied to develop dental adhesive capable of self-strengthening property in wet environments.

scholarly journals Hierarchically porous π-conjugated polyHIPE as a heterogeneous photoinitiator for free radical polymerization under visible light

2014 ◽  
Vol 5 (11) ◽  
pp. 3559-3562 ◽  
Author(s):  
Zi Jun Wang ◽  
Katharina Landfester ◽  
Kai A. I. Zhang
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Methyl Methacrylate ◽  
Energy Saving ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Free Radical Polymerization ◽  
Light Bulb ◽  
Household Energy ◽  
Hierarchically Porous

A hierarchically porous π-conjugated polyHIPE was used as a heterogeneous visible light photoinitiator for the radical polymerization of methyl methacrylate (MMA) under a household energy saving light bulb at room temperature.

Stilbene-benzophenone dyads for free radical initiating polymerization of methyl methacrylate under visible light irradiation

2016 ◽  
Vol 132 ◽  
pp. 27-40 ◽  
Author(s):  
Xiaozhuan Qin ◽  
Ge Ding ◽  
Yulong Gong ◽  
Chuan Jing ◽  
Guangyue Peng ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Methyl Methacrylate ◽  
Visible Light Irradiation ◽  
Light Irradiation

scholarly journals Panchromatic Copper Complexes for Visible Light Photopolymerization

Photochem ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 167-189
Author(s):  
Alexandre Mau ◽  
Guillaume Noirbent ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Didier Gigmes ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Copper Complexes ◽  
Free Radical Polymerization ◽  
Photoluminescence Properties ◽  
System Formation ◽  
Iodonium Salt ◽  
Visible Light Photopolymerization ◽  
Cationic Polymerizations

In this work, eleven heteroleptic copper complexes were designed and studied as photoinitiators of polymerization in three-component photoinitiating systems in combination with an iodonium salt and an amine. Notably, ten of them exhibited panchromatic behavior and could be used for long wavelengths. Ferrocene-free copper complexes were capable of efficiently initiating both the radical and cationic polymerizations and exhibited similar performances to that of the benchmark G1 system. Formation of acrylate/epoxy IPNs was also successfully performed even upon irradiation at 455 nm or at 530 nm. Interestingly, all copper complexes containing the 1,1′-bis(diphenylphosphino)ferrocene ligand were not photoluminescent, evidencing that ferrocene could efficiently quench the photoluminescence properties of copper complexes. Besides, these ferrocene-based complexes were capable of efficiently initiating free radical polymerization processes. The ferrocene moiety introduced in the different copper complexes affected neither their panchromatic behaviors nor their abilities to initiate free radical polymerizations.

scholarly journals Effect of Ferocene Concentration on the Percent Conversion and Molecular Weight of Poly(Methyl Methacrylate) Homopolymers

2017 ◽  
Vol 14 (2) ◽  
pp. 311-319
Author(s):  
Baghdad Science Journal
Keyword(s):  
Molecular Weight ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Radical Polymerization ◽  
Free Oxygen ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Percent Conversion ◽  
Methyl Methacrylate Monomer

This research is addressing the effect of different ferrocene concentration (0.00, 2.15x10-3, 4.30x10-3, 8.60x10-3, and 12.9x10-3) on the bulk free radical polymerization of methyl methacrylate monomer in benzene using benzoyl peroxide as initiator. The polymerization was conducted at 60º C under free oxygen atmosphere. The resulting polymers were characterized by FTIR. The results were compared with the presence and absence of ferrocene at 10% conversion. The %conversion was 3.04% with no ferrocene present in the polymerization medium and its increase to 9.06 with a first lowest ferrocene concentration added, i.e. 2.15 x10-3mol/l. This was positively reflected on the poly(methyl methacrylate) molecular weight measured by viscosity technique, especially in the presence of ferrocene.

Viscosity effects in the free-radical polymerization of methyl methacrylate

1977 ◽  
Vol 357 (1689) ◽  
pp. 183-192 ◽  
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Kinetic Scheme ◽  
Translational Diffusion ◽  
Chain Termination ◽  
Polymerization Rate ◽  
Solution Viscosity ◽  
Viscosity Effects ◽  
Free Radical Initiator

Methyl methacrylate has been polymerized in the presence of poly(methyl methacrylate) by using a free-radical initiator. The efficiency of the initiator is shown to be independent of the viscosity. At high viscosities, chain termination was influenced by the rate of translational diffusion of the polymer radicals. The dependence of the polymerization rate on viscosity is less than that predicted by a simple kinetic scheme. It appears that only those radicals which are above a certain size have their chain termination reactions controlled by the solution viscosity. This limiting size decreases as the viscosity increases.

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