✦ LIBER ✦
Lithium alkylnickelate and alkylpalladate bimetallic “ate” complexes as initiators for anionic polymerization of methyl methacrylate
✍ Scribed by Daniela Mardare; Krzysztof Matyjaszewski
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 503 KB
- Volume
- 196
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Anionic‐coordinative polymerization of methyl methacrylate (MMA) was carried out in the presence of new bimetallic initiators based on lithium alkylnickelates and alkylpalladates in tetrahydrofuran, at −78°C. Well‐defined poly(methyl methacrylate), PMMA, with molecular weights increasing linearly with conversion and relatively narrow polydispersities (M̄~w~/M̄~n~ = 1,26 to 1,4) were prepared by initiation with some of the “ate” complexes. In the presence of lithium “ate” Ni‐based complexes, PMMA with enhanced syndiotacticity [(rr) = 73 to 75%] was formed.