Photoinduced free radical promoted cationic polymerization 40 years after its discovery

2020 ◽  
Vol 11 (6) ◽  
pp. 1111-1121 ◽  
Author(s):  
Mehmet Atilla Tasdelen ◽  
Jacques Lalevée ◽  
Yusuf Yagci
Keyword(s):  
Free Radical ◽  
Cationic Polymerization ◽  
Polymer Synthesis ◽  
Historical Background ◽  
Cationic Photopolymerization

Free radical promoted cationic photopolymerization has been described with its historical background, main principles and usage in polymer synthesis.

scholarly journals Photoinitiated cationic polymerization using allylsulfonium salts. Substituent effect on the initiator activity

e-Polymers ◽  
2001 ◽  
Vol 1 (1) ◽  
Author(s):  
Fatma Bayramoglu ◽  
Aysen Onen ◽  
Yusuf Yagci
Keyword(s):  
Electron Transfer ◽  
Free Radical ◽  
Cationic Polymerization ◽  
Substituent Effect ◽  
Cyclohexene Oxide ◽  
Cationic Photopolymerization ◽  
Transfer Mechanisms

AbstractAllylthiophenium salts with various substituents at the allylic moiety were synthesized, characterized and shown to be efficient coinitiators in radicallly promoted cationic photopolymerization of cyclohexene oxide. The relative efficiencies of these salts in combination with benzoin and benzophenone as free radical sources in the photopolymerizations are compared. Both additionfragmentation and electron transfer mechanisms are proposed and their relative merits discussed.

scholarly journals Recent Advances in bis-Chalcone-Based Photoinitiators of Polymerization: From Mechanistic Investigations to Applications

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3192
Author(s):  
Nicolas Giacoletto ◽  
Frédéric Dumur
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Cationic Polymerization ◽  
Free Radical Polymerization ◽  
Research Field ◽  
4D Printing ◽  
Unique Structure ◽  
The Past ◽  
Mechanistic Investigations ◽  
Active Research

Over the past several decades, photopolymerization has become an active research field, and the ongoing efforts to develop new photoinitiating systems are supported by the different applications in which this polymerization technique is involved—including dentistry, 3D and 4D printing, adhesives, and laser writing. In the search for new structures, bis-chalcones that combine two chalcones’ moieties within a unique structure were determined as being promising photosensitizers to initiate both the free-radical polymerization of acrylates and the cationic polymerization of epoxides. In this review, an overview of the different bis-chalcones reported to date is provided. Parallel to the mechanistic investigations aiming at elucidating the polymerization mechanisms, bis-chalcones-based photoinitiating systems were used for different applications, which are detailed in this review.

A Visible Light Initiating System for Free Radical Promoted Cationic Polymerization

1994 ◽  
Vol 27 (14) ◽  
pp. 3683-3693 ◽  
Author(s):  
Yubai Bi ◽  
Douglas C. Neckers
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Cationic Polymerization
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