本篇論文主要是合成一種兩性共聚物，聚(甲基丙烯醯胺-氮-[3- (二甲基胺)-丙基醋酸鈉]-甲基丙烯醯胺，探討不同分子量之PDSM對於鈦酸鋇BT水系漿體分散性質的影響，並與Darvan C比較。本研究中合成之共聚物以1H-NMR及FTIR確認其結構並利用GPC測得四種PDSM之分子量，並以電位滴定儀測量單體比例及解離率。
將合成之PDSM添加於BT漿體中，經由測試流變行為、界達電位、粒徑分佈等方法來探討漿體之穩定性，並量測BT漿體中鋇離子的溶出。實驗結果顯示添加PDSM (Mw=2.5×105) 在漿體的分散效果優於其他分子量，因PDSM (Mw=2.5×105) 使得漿體有較低的黏度、較大的界達電位、較小的粒徑分佈及鋇離子溶出量減少，其分散效果和Darvan C相近，故添加此共聚物能夠使漿體達到良好分散且穩定之效果；經過壓胚、燒結後的胚體之密度及介電常數均較Darvan C高，顯示PDSM (Mw=2.5×105) 對BT漿體有很好的分散效果。

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