Formation of star-like water-soluble polymeric structures in the process of radical polymerization of N-isopropylacrylamide in the presence of C60
| Autor: | A. A. Grishchuk, E. G. Atovmyan, Ya. I. Estrin, G. A. Estrina |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Chemistry Induction period Radical Radical polymerization technology industry and agriculture macromolecular substances 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Polymerization Polymer chemistry Reactivity (chemistry) Solubility 0210 nano-technology Ionic polymerization |
| Zdroj: | Russian Chemical Bulletin. 65:2082-2088 |
| ISSN: | 1573-9171 1066-5285 |
| DOI: | 10.1007/s11172-016-1556-z |
| Popis: | The formation of star-like N-isopropylacrylamide (NIPA) polymeric structures in the presence of C60 occurs in two steps. In the polymerization induction period, water-insoluble cores of future star-like polymers (SP) are formed. The cores are composed of one or more C60 molecules linked by a C—C bond, five or six initiator radicals, and several short NIPA polymeric chains. The formation of SP begins after the induction period and continues until the end of polymerization through gradual growth of the polymeric layer at the cores. The solubility of SP in water is determined by a certain initial concentration of NIPA. It is suggested that the mechanism of these processes is determined by a dependence of C60 reactivity on the degree of its “substitution”. |
| Databáze: | OpenAIRE |
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