Networks Based on 'Core-First' Star Polymers End-Linked Using a Degradable Ketal Cross-Linker: Synthesis, Characterization, and Cleavage
| Autor: | Kepola, Eleni J., Patrickios, Costas S. |
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| Přispěvatelé: | Patrickios, Costas S. [0000-0001-8855-0370] |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Polymers and Plastics
High molecular weight star polymers 02 engineering and technology Low molecular weight 010402 general chemistry 01 natural sciences Molecular weight Polymerization anionic polymerization chemistry.chemical_compound Hydrolysis Polymer chemistry Materials Chemistry Networks (circuits) crosslinking Physical and Theoretical Chemistry Methyl methacrylate Dissolution degradation chemistry.chemical_classification Bimodal size distribution Chemistry Organic Chemistry Cleavage (crystal) Esters Polymer Size distribution 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Anionic addition polymerization Monomer Methyl methacrylates networks Polymer networks group transfer polymerization 0210 nano-technology Degradation products Acrylic monomers |
| Zdroj: | Macromolecular Chemistry and Physics Macromol.Chem.Phys. |
| Popis: | Sequential group transfer polymerization of cross-linker, monomer (methyl methacrylate), and cross-linker again is used to prepare cleavable polymer networks based on interconnected “core-first” star polymers. By employing a degradable and a nondegradable cross-linker, four networks are prepared. While cleavage of the degradable cross-linker residues leads to complete polymer network dissolution, the degradation products do not always display the expected molecular weight features. These products are the expected in the case of the network prepared using only the degradable cross-linker (monomodal size distribution with expected low molecular weight) and also in the case of the network prepared using first the degradable and then the nondegradable cross-linker (bimodal size distribution including high molecular weight star polymers), but not so in the case of the network prepared using first the nondegradable and then the degradable cross-linker, where the expected high molecular weight star polymer component is missing due to star recombination after hydrolysis. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 219 1 |
| Databáze: | OpenAIRE |
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