Citation: Jia-xue Liu, Yong-feng Men. PHASE BEHAVIOR OF CHARGE STABLIZED COLLOID DISPERSION WITH ADDED WATER SOLUBLE POLYMERS[J]. Chinese Journal of Polymer Science, ;2013, 31(9): 1218-1224. doi: 10.1007/s10118-013-1308-6 shu

PHASE BEHAVIOR OF CHARGE STABLIZED COLLOID DISPERSION WITH ADDED WATER SOLUBLE POLYMERS

Jia-xue Liu ,
Yong-feng Men ^,

Corresponding author: Yong-feng Men,
Received Date: 21 March 2013
Revised Date: 7 May 2013

Fund Project: This work was supported by the National Basic Research Program of China (No. 2012CB821500) and the HASYLAB project (No. II-20080190).

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.
- Colloid-polymer mixture,
- Phase behavior,
- Crystallization
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