Synthesis and analysis of cross-linked polystyrene / polymethyl methacrylate core-shell colloidal particles
碩士 === 國立中正大學 === 化學工程所 === 97 === We describe the preparation and characterizations of cross-linked core-shell colloidal particles made of a polystyrene core and a poly (methyl methacrylate) shell. The core-shell particles were prepared by seeded soapless emulsion polymerization, and were character...
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| Format: | Others |
| Language: | zh-TW |
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2009
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| Online Access: | http://ndltd.ncl.edu.tw/handle/39667495056912806648 |
| Summary: | 碩士 === 國立中正大學 === 化學工程所 === 97 === We describe the preparation and characterizations of cross-linked core-shell colloidal particles made of a polystyrene core and a poly (methyl methacrylate) shell. The core-shell particles were prepared by seeded soapless emulsion polymerization, and were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM) and dynamic light scattering (DLS). To investigate rheo-optical properities of the particles in the future, we dispersed the particles in a high-viscosity solvent (Diethyl phthalate ; DEP) and other organic solvents. Swelling of the particles in DEP was not observed, suggesting that the crosslinking density of the particles was high and thus the dispersion capability was low. One possible cause of this phenomena was that the surface charge of the core has been screened by the shell material.
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