Stereocontrol in radical polymerization of acrylic monomers
A clear effect of Lewis acids, such. as scandium trifluoromethanesulfonate [Sc(OTf)3], on stereocontrol during the radical polymerization of a designed monomer, benzyl α‐(methoxymethyl)acrylate was found. This Lewis acid also influenced the stereochemistry in the radical polymerization of methyl met...
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| Published in | Macromolecular symposia. Vol. 183; no. 1; pp. 83 - 88 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
Weinheim
WILEY-VCH Verlag
01.07.2002
WILEY‐VCH Verlag |
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| Abstract | A clear effect of Lewis acids, such. as scandium trifluoromethanesulfonate [Sc(OTf)3], on stereocontrol during the radical polymerization of a designed monomer, benzyl α‐(methoxymethyl)acrylate was found. This Lewis acid also influenced the stereochemistry in the radical polymerization of methyl methacrylate giving a less syndiotactic and more isotactic polymer, although many Lewis acids were not effective. A catalytic amount of Lewis acids, such as Y(OTf)3 and Yb(OTf)3, also significantly enhanced isotactic‐specificity during the radical polymerization of acrylamide and its derivatives, N‐isopropylacrylamide (NIPAM) and N,N‐dimethylacrylamide. Obvious solvent and temperature effects on tacticity were observed in these polymerizations, and poly(NIPAM) with >80% triad isotactic content has been obtained in the presence of Lewis acids. |
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| AbstractList | A clear effect of Lewis acids, such. as scandium trifluoromethanesulfonate [Sc(OTf)3], on stereocontrol during the radical polymerization of a designed monomer, benzyl α‐(methoxymethyl)acrylate was found. This Lewis acid also influenced the stereochemistry in the radical polymerization of methyl methacrylate giving a less syndiotactic and more isotactic polymer, although many Lewis acids were not effective. A catalytic amount of Lewis acids, such as Y(OTf)3 and Yb(OTf)3, also significantly enhanced isotactic‐specificity during the radical polymerization of acrylamide and its derivatives, N‐isopropylacrylamide (NIPAM) and N,N‐dimethylacrylamide. Obvious solvent and temperature effects on tacticity were observed in these polymerizations, and poly(NIPAM) with >80% triad isotactic content has been obtained in the presence of Lewis acids. A clear effect of Lewis acids, such. as scandium trifluoromethanesulfonate [Sc(OTf)3], on stereocontrol during the radical polymerization of a designed monomer, benzyl -(methoxymethyl)acrylate was found. This Lewis acid also influenced the stereochemistry in the radical polymerization of methyl methacrylate giving a less syndiotactic and more isotactic polymer, although many Lewis acids were not effective. A catalytic amount of Lewis acids, such as Y(OTf)3 and Yb(OTf)3, also significantly enhanced isotactic-specificity during the radical polymerization of acrylamide and its derivatives, N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide. Obvious solvent and temperature effects on tacticity were observed in these polymerizations, and poly(NIPAM) with >80% triad isotactic content has been obtained in the presence of Lewis acids. |
| Author | Habaue, Shigeki Isobe, Yutaka Nakano, Tamaki Okamoto, Yoshio |
| Author_xml | – sequence: 1 givenname: Yoshio surname: Okamoto fullname: Okamoto, Yoshio organization: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan – sequence: 2 givenname: Shigeki surname: Habaue fullname: Habaue, Shigeki organization: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan – sequence: 3 givenname: Yutaka surname: Isobe fullname: Isobe, Yutaka organization: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan – sequence: 4 givenname: Tamaki surname: Nakano fullname: Nakano, Tamaki organization: Graduate School of Material Science, Nara Institute of Science and Technology, Takayama-cho 8916-5, Ikoma, Nara 630-0101, Japan |
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| Snippet | A clear effect of Lewis acids, such. as scandium trifluoromethanesulfonate [Sc(OTf)3], on stereocontrol during the radical polymerization of a designed... |
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| StartPage | 83 |
| SubjectTerms | Derivatives Isotactic Lewis acid Monomers Polymerization Polymethyl methacrylates Radicals Scandium |
| Title | Stereocontrol in radical polymerization of acrylic monomers |
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