Characterization of the Uv - Visible Absorption Spectra of Commonly Used Photoinitiators

Rongxia, Bu; Shiyong, Luo; Xu, Wencai; Ruiqiang, Meng; He, Dawei; Kelin, Mao; Huang, Jiangwei; Xiao, Yong; Caichang, Li

doi:10.26480/wsmce.01.2017.18.20

Cited by 4 publications

(3 citation statements)

References 1 publication

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 7 depicts the absorption spectrum of some unimolecular and bimolecular photoinitiators [ 121 ]. It can be seen how photoinitiators A and C absorb at the UV LED wavelength range, while photoinitiators B and C would not be activated with an LED lamp.…”

Section: Constituents Of a Free Radical Uv Curing Systemmentioning

confidence: 99%

See 1 more Smart Citation

Free-Radical Photopolymerization for Curing Products for Refinish Coatings Market

Ribas-Massonis

Cicujano²,

Duran

et al. 2022

Polymers

View full text Add to dashboard Cite

Even though there are many photocurable compositions that are cured by cationic photopolymerization mechanisms, UV curing generally consists of the formation of cross-linking covalent bonds between a resin and monomers via a photoinitiated free radical polymerization reaction, obtaining a three-dimensional polymer network. One of its many applications is in the refinish coatings market, where putties, primers and clear coats can be cured faster and more efficiently than with traditional curing. All these products contain the same essential components, which are resin, monomers and photoinitiators, the latter being the source of free radicals. They may also include additives used to achieve a certain consistency, but always taking into account the avoidance of damage to the UV curing—for example, by removing light from the innermost layers. Surface curing also has its challenges since it can be easily inhibited by oxygen, although this can be solved by adding scavengers such as amines or thiols, able to react with the otherwise inactive peroxy radicals and continue the propagation of the polymerization reaction. In this review article, we cover a broad analysis from the organic point of view to the industrial applications of this line of research, with a wide current and future range of uses.

show abstract

Section: Constituents Of a Free Radical Uv Curing Systemmentioning

confidence: 99%

“… Absorption spectra of two unimolecular photoinitiators ( A , B ) and two bimolecular photoinitiators ( C , D ) dissolved in acetonitrile at a 0.01% mass fraction [ 121 ]. …”

Section: Figures Schemes and Chartmentioning

confidence: 99%

Free-Radical Photopolymerization for Curing Products for Refinish Coatings Market

Ribas-Massonis

Cicujano²,

Duran

et al. 2022

Polymers

View full text Add to dashboard Cite

show abstract

“…TPO was chosen due to its strong absorbance near the wavelength of the UV lamp that was used. 29 In order to control the exposure of the wood, pieces were fully immersed and allowed to soak for either 1 or 60 minutes. During this time, a salt of PEI and HMP is adsorbed onto the wood's surface, which is then cured by UV exposure into an ionically crosslinked solid when HMP polymerizes (Fig.…”

Section: Photopolymer Complexationmentioning

confidence: 99%