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Recent Developments in Photoinitiators

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 2307

Special Issue Editor


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Guest Editor
Laboratory of Photochemistry and Optical Spectroscopy, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
Interests: applied photochemistry; novel cationic and free-radical photoinitiators; photopolymerization; light-induced polymerization processes; 3D printing; photoredox catalysts; organocatalysts and metal complexes as photoinitiators; luminescent sensors; fluorescent probes; organic and organometallic chemistry (rare-earch complexes); ring-opening polymerization

Special Issue Information

Dear Colleagues,

At present, photopolymerization processes are particularly significant in the modern chemical industry, and the fundamental components that guarantee the efficient process are photoinitiators. Currently, the multitude of requirements for modern photoinitiators results in a growing demand for improved, more efficient, and user-friendly photoinitiators. In addition to single-component initiators, multicomponent initiating systems are playing an increasingly important market role. Furthermore, great attention is being paid to the toxicity of such initiators, which is why raw materials of natural origin are becoming more frequently chosen for the synthesis of photoinitiators. Numerous research methods and increasingly efficient computer calculations make it possible to precisely understand, investigate, and justify the nature and mechanism of initiation of photoinitiators.

In this issue, the latest developments in the field of synthesis, physicochemical properties of new photoinitiators, as well as modern trends of applications of such compounds are highlighted and discussed.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Review articles, full papers, and communications are very welcome.

Prof. Dr. hab. Joanna Ortyl
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Photoinitiators
  • Cationic photoinitiators
  • Type I free-radical photoinitiators
  • Type II free-radical photoinitiators
  • Photoinitiating systems (Bimolecular PISs
  • Multicomponent PISs)
  • Two photon initiators
  • Photosensitizers and dyes
  • Mechanism of initiation
  • Photopolymerization
  • Cationic photopolymerization
  • Free-radical photopolymerization
  • Thiol-ene photopolymerization
  • Fre- radical promoted cationic polymerization (FRPCP)
  • Photopolymerization of Interpenetrating Polymer Networks
  • Photoinduced atom transfer radical polymerization (photo-ATRP)
  • Light-controlled radical polymerization (photo-CRP)
  • Photoelectron transfer reversible addition–fragmentation chain transfer (PET–RAFT) polymerization
  • Photoinduced electron transfer (PET)
  • Photoredox catalysts
  • Photoinitiated reaction

Published Papers (1 paper)

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Research

12 pages, 2901 KiB  
Article
Novel Photoreactive Pressure-Sensitive Adhesives (PSA) Based on Acrylics Containing Additionable Photoinitiators
by Zbigniew Czech, Janina Kabatc, Marcin Bartkowiak, Adam Licbarski, Karolina Mozelewska and Dominika Kwiatkowska
Materials 2020, 13(22), 5151; https://doi.org/10.3390/ma13225151 - 16 Nov 2020
Cited by 9 | Viewed by 1952
Abstract
A new class of additionable ultraviolet photoinitiators that can be used, through addition, for modification of the acrylic polymer chain and their influence of main properties of acrylic pressure-sensitive adhesives (PSAs) is described here. The photoinitiators studied are based on benzophenone, dibenzofuran and [...] Read more.
A new class of additionable ultraviolet photoinitiators that can be used, through addition, for modification of the acrylic polymer chain and their influence of main properties of acrylic pressure-sensitive adhesives (PSAs) is described here. The photoinitiators studied are based on benzophenone, dibenzofuran and anthraquinone chromophores. The propyleneimine carbonyl is the reactive additionable group incorporated in the photoinitiator structure. First, the solvent-borne acrylic pressure-sensitive adhesive was synthesized and characterized. Then, a photoinitiator suitable for addition to the acrylic polymer chain possessing a carboxyl group was added before UV-irradiation. A mechanism of UV-initiated cross-linking reaction of acrylic PSA with additionable photoinitiators was done as well. The influence of the concentration and type of photoinitiator, UV-crosslinking time and UV-dose on peel adhesion, shear strength and tack of solvent-borne acrylic pressure-sensitive adhesives cross-linked by UV light was studied and presented here. It was found that the tack depends on the UV-dose and photoinitiator concentration. An increase of UV dose results in an increase of shear strength of acrylic pressure-sensitive adhesive (PSA) formulations. Full article
(This article belongs to the Special Issue Recent Developments in Photoinitiators)
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