Control of Molecular Weight and Tacticity in Stereospecific Living Cationic Polymerization of α-Methylstyrene at 0 °C Using FeCl3 -Based Initiators: Effect of Tacticity on Thermal Properties

2013 ◽  
Vol 214 (12) ◽  
pp. 1332-1344 ◽  
Author(s):  
Sanjib Banerjee ◽  
Tapas K. Paira ◽  
Tarun K. Mandal
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Cationic Polymerization ◽  
Living Cationic Polymerization

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.

scholarly journals Terpenoid-derived conjugated dienes with exo-methylene and a 6-membered ring: high cationic reactivity, regioselective living cationic polymerization, and random and block copolymerization with vinyl ethers

2021 ◽  
Vol 12 (9) ◽  
pp. 1186-1198
Author(s):  
Takenori Nishida ◽  
Kotaro Satoh ◽  
Masazumi Tamura ◽  
Yingai Li ◽  
Keiichi Tomishige ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Cationic Polymerization ◽  
Conjugated Dienes ◽  
Membered Ring ◽  
Block Copolymerization ◽  
Vinyl Ethers ◽  
Living Cationic Polymerization

Biobased exo-methylene-conjugated dienes underwent regioselective living cationic polymerization to result in well-defined homo- and copolymers with good thermal properties.

scholarly journals Block Copolymer Synthesis by the Combination of Living Cationic Polymerization and Other Polymerization Methods

2021 ◽  
Vol 9 ◽  
Author(s):  
Asmita Dey ◽  
Ujjal Haldar ◽  
Priyadarsi De
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Cationic Polymerization ◽  
Chemical Properties ◽  
Good Control ◽  
Vital Role ◽  
Living Cationic Polymerization ◽  
Wide Range ◽  
Post Modification

The foremost limitation of block copolymer synthesis is to polymerize two or more different types of monomers with different reactivity profiles using a single polymerization technique. Controlled living polymerization techniques play a vital role in the preparation of wide range of block copolymers, thus are revolutionary techniques for polymer industry. Polymers with good control over molecular weight, molecular weight distribution, chain-end functionality and architectures can be prepared by these processes. In order to improve the existing applications and create new opportunities to design a new block copolymer system with improved physical and chemical properties, the combination of two different polymerization techniques have tremendous scope. Such kinds of macromolecules may be attended by combination of homopolymerization of different monomers by post-modification techniques using a macroinitiator or by using a dual initiator which allows the combination of two mechanistically distinct techniques. This review focuses on recent advances in synthesis of block copolymers by combination of living cationic polymerization with other polymerization techniques and click chemistry.

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