Rheokinetics of the in situ formation of a poly(methyl methacrylate)–polyurethane blend in the presence of an oligomeric initiator of polymerization: Morphology and mechanical properties of the final reaction products
| Autor: | V. F. Shumskii, I. P. Getmanchuk, O. I. Antonenko, O. V. Babich, L. F. Kosyanchuk, V. K. Grishchenko, N.A. Busko, T.D. Ignatova |
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| Rok vydání: | 2015 |
| Předmět: |
Morphology (linguistics)
Polymers and Plastics Chemistry Radical polymerization Poly(methyl methacrylate) chemistry.chemical_compound Rheology Polymerization visual_art Polymer chemistry Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Methyl methacrylate Dispersion (chemistry) Polyurethane |
| Zdroj: | Polymer Science Series B. 57:488-496 |
| ISSN: | 1555-6123 1560-0904 |
| DOI: | 10.1134/s1560090415050152 |
| Popis: | The relationship between the rheokinetics of the in situ formation of a linear poly(methyl methacrylate)–crosslinked polyurethane blend in the presence of various amounts of an oligomeric azo initiator containing polyurethane chain fragments and groups able to initiate the radical polymerization of methyl methacrylate and the process of phase separation, the morphology, and the mechanical properties of the final products is studied. It is shown that the times of phase separation and gelation are interrelated and depend on the concentration of the azo initiator in a simple manner. This initiator affects the structural and rheological transitions in the system and leads to the formation of morphologies with smaller domains. The most stable system with the best dispersion of polyurethane in poly(methyl methacrylate) is the blend containing 0.002 mol/L azo initiator that possesses the optimum mechanical properties. |
| Databáze: | OpenAIRE |
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