Phase behavior of charge stablized colloid dispersion with added water soluble polymers
| Autor: | Jia-xue Liu, Yongfeng Men |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
endocrine system Materials science Polymers and Plastics Small-angle X-ray scattering General Chemical Engineering digestive oral and skin physiology Organic Chemistry Polymer complex mixtures law.invention Condensed Matter::Soft Condensed Matter Colloid Chemical engineering chemistry law Phase (matter) Volume fraction Organic chemistry Crystallization Dispersion (chemistry) Phase diagram |
| Zdroj: | Chinese Journal of Polymer Science. 31:1218-1224 |
| ISSN: | 1439-6203 0256-7679 |
| DOI: | 10.1007/s10118-013-1308-6 |
| Popis: | Demixing and colloidal crystallization in the mixture of charge stabilized colloidal poly(methyl methacrylate) particles and soluble poly(ethylene oxide) were investigated by means of synchrotron small-angle X-ray scattering (SAXS) technique. Phase diagram of the mixture was obtained based on visual inspection and SAXS results. The phase behavior is determined as a function of the concentration of the polymer as well as the volume fraction of the colloidal particles. The system shows a one phase region when the concentration of the polymer is low, whereas a two-phase region is present when the concentration of the polymer is larger than a critical concentration at certain volume fraction of the colloids. Interestingly, a face centered cubic colloidal crystalline structure was formed under certain conditions, which has been rarely observed in experiments of colloid-polymer mixtures with competing interactions. |
| Databáze: | OpenAIRE |
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