Polymerization of Methacrylic Esters Using Metal Alkoxides Containing Lanthanoids
| Autor: | Shigeki Habaue, Mayumi Yoshikawa, Yoshio Okamoto |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Meerwein–Ponndorf–Verley reduction
Polymers and Plastics chemistry.chemical_element Solution polymerization chemistry.chemical_compound Anionic addition polymerization chemistry Polymerization Alkoxide Polymer chemistry Materials Chemistry Organic chemistry Lithium Methyl methacrylate Tetrahydrofuran |
| Zdroj: | Polymer Journal. 27:986-992 |
| ISSN: | 1349-0540 0032-3896 |
| Popis: | Polymerization of methyl methacrylate (MMA) was promoted by the clusters of lithium isopropoxide containing lanthanoid(III) isopropoxides [La(O i-Pr) 3 (1) and Ce(O i-Pr) 3 (2)], prepared from the corresponding lanthanoid(III) chlorides according to the Kagan's method. The initiators provided an isotactic poly(MMA) in a good yield, although lithium isopropoxide afforded no polymer in toluene at 0°C. While lithium isopropoxide also gave no polymer in tetrahydrofuran at 0°C, syndiotactic poly(MMA) was obtained even at -40°C using the cerium triisopropoxide (2) in 91% yield. The polymerization was confirmed to be initiated through Meerwein- Ponndorf-Verlev (MPV) reduction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|