Synthesis of Graft Copolymers by the Combination of ATRP and Enzymatic ROP in scCO2
| Autor: | Silvia Villarroya, Steven M. Howdle, Kristofer J. Thurecht, Jiaxiang Zhou |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Polymers and Plastics
Chemistry Organic Chemistry Radical polymerization technology industry and agriculture Chain transfer macromolecular substances Inorganic Chemistry End-group Living free-radical polymerization Chain-growth polymerization Polymerization Polymer chemistry Materials Chemistry Reversible addition−fragmentation chain-transfer polymerization Ionic polymerization |
| Zdroj: | Macromolecules. 39:9080-9086 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma061068n |
| Popis: | A simple strategy is reported for the synthesis of well-defined graft copolymers of poly(methyl methacrylate-co-2-hydroxyethyl methacrylate) P(MMA-co-HEMA) with poly(e-caprolactone) (PCL) grafted chains. Using scCO2 as the only solvent, a one-step synthetic approach is adopted to prepare copolymer backbones via atom transfer radical polymerization (ATRP), and grafted chains are added via enzymatic ring-opening polymerization (eROP). Exhaustive study of the enzymatic grafting efficiency showed that only the hydroxyl groups in the backbone initiated the polymerization of e-CL, resulting in an exceptional polymer architecture which is not accessible by conventional chemical polymerization methodology. The lower grafting density obtained (ca. 30−40%) with the enzymatic polymerization of e-CL indicates that the system is likely limited by steric hindrance. |
| Databáze: | OpenAIRE |
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