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Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O
Aqueous cationic polymerizations of vinyl ethers (isobutyl vinyl ether (IBVE), 2-chloroethyl vinyl ether (CEVE), and n-butyl vinyl ether (n-BVE)) were performed for the first time by a CumOH/B(C(6)F(5))(3)/Et(2)O initiating system in an air atmosphere. The polymerization proceeded in a reproducible...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473351/ https://www.ncbi.nlm.nih.gov/pubmed/30960484 http://dx.doi.org/10.3390/polym11030500 |
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author | Zhang, Jinghan Wu, Yibo Chen, Kaixuan Zhang, Min Gong, Liangfa Yang, Dan Li, Shuxin Guo, Wenli |
author_facet | Zhang, Jinghan Wu, Yibo Chen, Kaixuan Zhang, Min Gong, Liangfa Yang, Dan Li, Shuxin Guo, Wenli |
author_sort | Zhang, Jinghan |
collection | PubMed |
description | Aqueous cationic polymerizations of vinyl ethers (isobutyl vinyl ether (IBVE), 2-chloroethyl vinyl ether (CEVE), and n-butyl vinyl ether (n-BVE)) were performed for the first time by a CumOH/B(C(6)F(5))(3)/Et(2)O initiating system in an air atmosphere. The polymerization proceeded in a reproducible manner through the careful design of experimental conditions (adding initiator, co-solvents, and surfactant or decreasing the reaction temperature), and the polymerization characteristics were systematically tested and compared in the suspension and emulsion. The significant difference with traditional cationic polymerization is that the polymerization rate in aqueous media using B(C(6)F(5))(3)/Et(2)O as a co-initiator decreases when the temperature is lowered. The polymerization sites are located on the monomer/water surface. Density functional theory (DFT) was applied to investigate the competition between H(2)O and alcohol combined with B(C(6)F(5))(3) for providing a theoretical basis. The effectiveness of the proposed mechanism for the aqueous cationic polymerization of vinyl ethers using CumOH/B(C(6)F(5))(3)/Et(2)O was confirmed. |
format | Online Article Text |
id | pubmed-6473351 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64733512019-05-03 Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O Zhang, Jinghan Wu, Yibo Chen, Kaixuan Zhang, Min Gong, Liangfa Yang, Dan Li, Shuxin Guo, Wenli Polymers (Basel) Article Aqueous cationic polymerizations of vinyl ethers (isobutyl vinyl ether (IBVE), 2-chloroethyl vinyl ether (CEVE), and n-butyl vinyl ether (n-BVE)) were performed for the first time by a CumOH/B(C(6)F(5))(3)/Et(2)O initiating system in an air atmosphere. The polymerization proceeded in a reproducible manner through the careful design of experimental conditions (adding initiator, co-solvents, and surfactant or decreasing the reaction temperature), and the polymerization characteristics were systematically tested and compared in the suspension and emulsion. The significant difference with traditional cationic polymerization is that the polymerization rate in aqueous media using B(C(6)F(5))(3)/Et(2)O as a co-initiator decreases when the temperature is lowered. The polymerization sites are located on the monomer/water surface. Density functional theory (DFT) was applied to investigate the competition between H(2)O and alcohol combined with B(C(6)F(5))(3) for providing a theoretical basis. The effectiveness of the proposed mechanism for the aqueous cationic polymerization of vinyl ethers using CumOH/B(C(6)F(5))(3)/Et(2)O was confirmed. MDPI 2019-03-14 /pmc/articles/PMC6473351/ /pubmed/30960484 http://dx.doi.org/10.3390/polym11030500 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Jinghan Wu, Yibo Chen, Kaixuan Zhang, Min Gong, Liangfa Yang, Dan Li, Shuxin Guo, Wenli Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title | Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title_full | Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title_fullStr | Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title_full_unstemmed | Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title_short | Characteristics and Mechanism of Vinyl Ether Cationic Polymerization in Aqueous Media Initiated by Alcohol/B(C(6)F(5))(3)/Et(2)O |
title_sort | characteristics and mechanism of vinyl ether cationic polymerization in aqueous media initiated by alcohol/b(c(6)f(5))(3)/et(2)o |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473351/ https://www.ncbi.nlm.nih.gov/pubmed/30960484 http://dx.doi.org/10.3390/polym11030500 |
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