Structural Transitions in Triblock Copolymers Based on Poly(ethylene oxide) and Polyacrylamide under the Temperature Influence
| Autor: | Tatyana Zheltonozhskaya, N. E. Zagdanskaya, N. M. Permyakova, V. V. Shilov, Vladimir Syromyatnikov, Lesya Momot |
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| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Ethylene oxide Organic Chemistry Polyacrylamide technology industry and agriculture Oxide Infrared spectroscopy macromolecular substances Polymer biochemical phenomena metabolism and nutrition Condensed Matter Physics chemistry.chemical_compound Crystallinity chemistry Polymer chemistry Materials Chemistry Copolymer Glass transition |
| Zdroj: | Macromolecular Symposia. 222:135-142 |
| ISSN: | 1521-3900 1022-1360 |
| Popis: | Thermal transitions in the bulk structure of triblock copolymers (PAA-b-PEO-b-PAA) based on polyacrylamide and poly(ethylene oxide) with varying molecular weight (length) of PEO block comparing with the structures of individual polymers and polymer mixtures were investigated. A lot of effects, such as the melting temperature depression, decreasing of the crystallinity degree of PEO and also appearance of the microphase separation in amorphous regions of the polymer mixtures and the triblock copolymers were found. Such investigations pointed to a strong intramolecular interaction of the polymer blocks in the triblock copolymers that is confirmed by the results of IR spectroscopy. It was shown that PEO and PAA blocks formed the system of H-bonds with participant of trans-multimers of amide groups. |
| Databáze: | OpenAIRE |
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