Cationic Polymerization of Vinyl Ethers using Trifluoromethyl Sulfonate/Solvent/Ligand to Access Well-controlled Poly(vinyl ether)s DOI Creative Commons
Liang-Yü Chen, Zhihao Wang,

En Fang

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Cationic polymerization of vinyl ethers to access poly(vinyl ether) polymeric materials has been challenging due stringent conditions and inevitable chain transfer. Herein we introduce a protocol using trifluoromethyl sulfonates catalyze the series ethers. These are fully commercially available can be stored under ambient conditions. Solvents ligands have profound influences on process, ether)s with different molecular weights, weight distributions, tacticities were obtained. A few combinations sulfonate/solvents/O^O type explored. They showed high activities afforded well-controlled tacticity, which isotacticity up 81%

Language: Английский

UV‐Curable High‐Refractive‐Index Resin Based on Polysulfide With Pendant Methacrylate Formed by Selective Cationic Ring‐Opening Polymerization of Thiirane DOI Open Access
Hiroto Kudo,

Koichi Hirose,

Ryota TSUTSUI

et al.

Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 23, 2025

ABSTRACT In this paper, we aimed to synthesize polysulfide with pendant methacryloyl groups in the side chain. They are expected have great potential for various applications as UV‐curable higher‐refractive‐index resins. Thiiran‐2‐ylmethyl methacrylate (TMA) could be synthesized by reaction of glycidyl thiourea using conc. H 2 SO 4 a catalyst. Selective ring‐opening polymerization TMA achieved CuCl an initiator CHCl 3 at 25°C, yielding corresponding polyTMA (MA) chain high yield. The copolymerization and phenoxypropylene sulfide (PPS) was also performed give poly(TMA (MA)m ‐ co ‐PPS n ) M = 1330–1940 ( w / 1.03–2.02) yields. UV‐curing thin films containing photo‐radical proceeded smoothly under UV light, quantitatively affording cured films. refractive indices before after irradiation were determined ellipsometry. Among them, (MA)22 78 showed highest index value 1.763) reaction.

Language: Английский

Citations

0
Unlocking Regioselectivity: Steric Effects and Conformational Constraints of Lewis Bases in Alkyllithium-Initiated Butadiene Polymerization DOI Creative Commons
Jian Tang, Yuan Fu, Jing Hua

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Steric effects play a critical role in the regioselectivity of anionic polymerization butadiene. Bulky Lewis bases hinder 1,4-insertion, favoring 1,2-selectivity, while conformational constraints further enhance this effect.

Language: Английский

Citations

3
Cationic Polymerization of Vinyl Ethers using Trifluoromethyl Sulfonate/Solvent/Ligand to Access Well-controlled Poly(vinyl ether)s DOI Creative Commons
Liang-Yü Chen, Zhihao Wang,

En Fang

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Cationic polymerization of vinyl ethers to access poly(vinyl ether) polymeric materials has been challenging due stringent conditions and inevitable chain transfer. Herein we introduce a protocol using trifluoromethyl sulfonates catalyze the series ethers. These are fully commercially available can be stored under ambient conditions. Solvents ligands have profound influences on process, ether)s with different molecular weights, weight distributions, tacticities were obtained. A few combinations sulfonate/solvents/O^O type explored. They showed high activities afforded well-controlled tacticity, which isotacticity up 81%

Language: Английский

Citations

0