陰離子共聚物的合成及做為水系鈦酸鋇漿體的分散劑

• Main Author: 楊逸斌
• Other Authors: 許貫中
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/78801343928601149176

碩士 === 國立臺灣師範大學 === 化學系 === 95 === In the preparation of a well-dispersed, and stable barium titanate (BT) slurry, the addition of dispersants is essential. This study is to synthesize an anionic copolymer, i.e., poly-[sodium 2-(2-methyl-acryloyloxy) ethansulfonate methacrylamide] (PMEA) as a dispersant for BT slurries. The chemical structure of synthesize PMEAs were varied from the IR and 1H-NMR spectra, and the weight-average molecular weights (Mw) of the copolymers determind by GPC to be 4.1×105，1.3×105，6.0×104 and 1.6×104. The dispersion properties of PMEA were examined by measuring the rheological property, sedimentation, and particle size of BT suspensions. The zeta potential and adsorption experiments were carried out. The green and sintered density of BT compacts were determind. Besides, the barium ions leached from BT particles in aqueous solutions were also measured results indicate that addition of PMEA can reduce the viscosity, stabilize the BT suspensions, reduce the particle size, and make BT compacts with higher green and sintered density, PMEA with Mw of 1.3×105 is more effective because the adsorption amount onto particle was greater and the achieved zeta potential more negative than polymers with other Mw. Finally, PMEA could reduce the leached barium ion in the BT suspensions.