Novel Rare Earth Catalysts for the Living Polymerization and Block Copolymerization of ε-Caprolactone

1996 ◽  
Vol 29 (26) ◽  
pp. 8289-8295 ◽  
Author(s):  
Youqing Shen ◽  
Zhiquan Shen ◽  
Yifeng Zhang ◽  
Kemin Yao
Keyword(s):  
Rare Earth ◽  
Living Polymerization ◽  
Block Copolymerization

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.

Regioselective, stereoselective, and living polymerization of divinyl pyridine monomers using rare earth catalysts

2020 ◽  
Vol 11 (12) ◽  
pp. 2044-2052 ◽  
Author(s):  
Chao Yan ◽  
Zhao-Xuan Liu ◽  
Tie-Qi Xu
Keyword(s):  
Rare Earth ◽  
Living Polymerization

The first regioselective, stereoselective, and living polymerization of divinyl pyridine monomers, mediated by simple rare earth catalysts, is reported.

NNN-Tridentate Pyrrolyl Rare-Earth Metal Complexes: Structure and Catalysis on Specific Selective Living Polymerization of Isoprene

2012 ◽  
Vol 31 (17) ◽  
pp. 6014-6021 ◽  
Author(s):  
Lingfang Wang ◽  
Dongtao Liu ◽  
Dongmei Cui
Keyword(s):  
Rare Earth ◽  
Metal Complexes ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Living Polymerization ◽  
Rare Earth Metal Complexes

Living polymerization and block copolymerization of various ring-substituted phenylacetylenes by rhodium-based ternary catalyst

2000 ◽  
Vol 45 (4-5) ◽  
pp. 335-339 ◽  
Author(s):  
Minoru Isomura ◽  
Yoshihiko Misumi ◽  
Toshio Masuda
Keyword(s):  
Living Polymerization ◽  
Block Copolymerization ◽  
Ternary Catalyst

Rare-Earth Metal Bis(alkyl)s Supported by a Quinolinyl Anilido-Imine Ligand: Synthesis and Catalysis on Living Polymerization of ε-Caprolactone

2008 ◽  
Vol 27 (22) ◽  
pp. 5889-5893 ◽  
Author(s):  
Wei Gao ◽  
Dongmei Cui ◽  
Xiaoming Liu ◽  
Yu Zhang ◽  
Ying Mu
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Living Polymerization ◽  
Ligand Synthesis

Highly Cis-1,4-Selective Living Polymerization of 1,3-Conjugated Dienes and Copolymerization with ε-Caprolactone by Bis(phosphino)carbazolide Rare-Earth-Metal Complexes

2011 ◽  
Vol 30 (4) ◽  
pp. 760-767 ◽  
Author(s):  
Lingfang Wang ◽  
Dongmei Cui ◽  
Zhaomin Hou ◽  
Wei Li ◽  
Yang Li
Keyword(s):  
Rare Earth ◽  
Metal Complexes ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Living Polymerization ◽  
Conjugated Dienes ◽  
Rare Earth Metal Complexes
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