Rheology and morphology of linear polyurethane and poly(methyl methacrylate) blends formed in situ
| Autor: | L. F. Kosyanchuk, V. F. Shumskii, I. P. Getmanchuk, O. V. Babich, O. I. Antonenko |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Polymers and Plastics education technology industry and agriculture food and beverages Poly(methyl methacrylate) Shear rate Viscosity chemistry.chemical_compound Rheology chemistry visual_art Phase (matter) Materials Chemistry visual_art.visual_art_medium Methyl methacrylate Composite material Dispersion (chemistry) Polyurethane |
| Zdroj: | Polymer Science Series A. 53:955-962 |
| ISSN: | 1555-6107 0965-545X |
| DOI: | 10.1134/s0965545x11090112 |
| Popis: | The rheological properties and morphology of flow during the in situ formation of linear polyurethane and poly(methyl methacrylate) blends of various compositions are studied. At a certain conversion of the components, the initial homogeneous blend undergoes phase separation, as evidenced by the nonadditive dependence of the logarithm of viscosity on blend composition. For individual components, the gel points correspond to appreciably different conversions. For components in blends of various compositions, this difference is less pronounced and associated with the kinetic conditions of blend formation. The morphology of flow of the reaction blend over the time (or conversion) between the onset of phase separation and gelation during flow with a high shear rate is determined by the blend composition and the ratio between the viscosity of the dispersion phase and the matrix. |
| Databáze: | OpenAIRE |
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