Kinetic Analysis of “Living” Polymerization Systems Exhibiting Slow Equilibria. 4.†“Dissociative” Mechanism of Group Transfer Polymerization and Generation of Free Ions in Cationic Polymerization

1996 ◽  
Vol 29 (7) ◽  
pp. 2346-2353 ◽  
Author(s):  
Axel H. E. Müller ◽  
Galina Litvinenko ◽  
Deyue Yan
Keyword(s):  
Kinetic Analysis ◽  
Cationic Polymerization ◽  
Living Polymerization ◽  
Dissociative Mechanism ◽  
Group Transfer ◽  
Free Ions

scholarly journals Naturally-Derived Amphiphilic Polystyrenes Prepared by Aqueous Controlled/Living Cationic Polymerization and Copolymerization of Vinylguaiacol with R–OH/BF3·OEt2

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1404 ◽  
Author(s):  
Hisaaki Takeshima ◽  
Kotaro Satoh ◽  
Masami Kamigaito
Keyword(s):  
Molecular Weight ◽  
Ferulic Acid ◽  
Cationic Polymerization ◽  
Living Polymerization ◽  
Block Copolymerization ◽  
Molecular Weights ◽  
Molecular Weight Distributions ◽  
Living Cationic Polymerization ◽  
Naturally Occurring ◽  
Weight Distributions

In this study, we investigated direct-controlled/living cationic polymerization and copolymerization of 4-vinylguaiacol (4VG), i.e., 4-hydroxy-3-methoxystyrene, which can be derived from naturally-occurring ferulic acid, to develop novel bio-based amphiphilic polystyrenes with phenol functions. The controlled/living cationic polymerization of 4VG was achieved using the R–OH/BF3·OEt2 initiating system, which is effective for the controlled/living polymerization of petroleum-derived 4-vinylphenol in the presence of a large amount of water via reversible activation of terminal C–OH bond catalyzed by BF3·OEt2, to result in the polymers with controlled molecular weights and narrow molecular weight distributions. The random or block copolymerization of 4VG was also examined using p-methoxystyrene (pMOS) as a comonomer with an aqueous initiating system to tune the amphiphilic nature of the 4VG-derived phenolic polymers. The obtained polymer can be expected not only to be used as a novel styrenic bio-based polymer but also as a material with amphiphilic nature for some applications.

A novel dissociative mechanism in acyl group transfer from aryl 4-hydroxybenzoates in aqueous solvents

1985 ◽  
Vol 50 (4) ◽  
pp. 479-484 ◽  
Author(s):  
Giorgio Cevasco ◽  
Giuseppe Guanti ◽  
Andrew R. Hopkins ◽  
Sergio Thea ◽  
Andrew Williams
Keyword(s):  
Dissociative Mechanism ◽  
Group Transfer
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