scholarly journals A User-friendly Living Cationic Polymerization: Degenerative Chain-transfer Polymerization of Vinyl Ethers by Simply Using Mixtures of Weak and Superstrong Protonic Acids

2019 ◽  
Vol 37 (9) ◽  
pp. 851-857 ◽  
Author(s):  
Mineto Uchiyama ◽  
Masataka Sakaguchi ◽  
Kotaro Satoh ◽  
Masami Kamigaito
Keyword(s):  
Cationic Polymerization ◽  
Chain Transfer ◽  
Vinyl Ethers ◽  
Living Cationic Polymerization ◽  
User Friendly ◽  
Chain Transfer Polymerization ◽  
Degenerative Chain Transfer ◽  
Protonic Acids

scholarly journals Visible Light-Controlled Living Cationic Polymerization of Methoxystyrene

2021 ◽  
Author(s):  
Lei Wang ◽  
Shaodong Zhang ◽  
Yongfeng Zhou ◽  
Yupo Xu ◽  
Quan Zuo ◽  
...  
Keyword(s):  
Visible Light ◽  
Cationic Polymerization ◽  
Molar Mass ◽  
Chain Transfer ◽  
Polymerization Reaction ◽  
Great Success ◽  
Living Cationic Polymerization ◽  
Green Led ◽  
Polymerization System ◽  
Lytic System

Photo-controlled living polymerization has received great attention in recent years. However, despite the great success therein, the report on photo-controlled living cationic polymerization has been greatly limited. We demonstrate here a novel decolorable, metal-free and visible light-controlled living cationic polymerization system by using tris(2,4-dimethoxyphenyl)methylium tetrafluoroborate as the photocatalyst and phosphate as the chain transfer agent (CTA) for polymerization of 4-methoxystyrene. This polymerization reaction under green LED light irradiation shows clear living characteristics including predictable molar mass, narrow molar-mass dispersity (Đ = 1.25), and sequential polymerization capability. In addition, the photocata-lytic system exits excellent “on-off” photo switchability and shows the longest “off period” of 36 h up to now for photo-controlled cationic polymerization. Furthermore, the residual photo-catalyst is easily deactivated and decolored with addition of a base after the polymerization.

Living cationic polymerization of vinyl ethers

1990 ◽  
Vol 32 (1) ◽  
pp. 181-197 ◽  
Author(s):  
Oskar Nuyken ◽  
Hubertus Kröner ◽  
Stefan Aechtner
Keyword(s):  
Cationic Polymerization ◽  
Vinyl Ethers ◽  
Living Cationic Polymerization
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