鈦酸鋇因具有強鐵電、壓電和介電等特性，為製造電容器、電感器、壓電感測器之重要原料。製程上鈦酸鋇粉末須先加入溶劑以配成漿料，目前所使用的溶劑分為水及有機溶劑兩類，基於環保與降低成本，近年來水系漿料的製備已引起矚目。為製備分散良好之漿體，常需加入聚電解質作為分散劑。隨著漿體pH值增加，高分子吸附量減少，但降低漿體pH值，高分子解離度降低、鋇離子溶出量增加。為了製備分散穩定的漿料，值得合成出具有良好分散效能且減少鋇離子溶出的高分子。
本研究主要合成兩種類水溶性高分子：一為陰離子型之聚(甲基丙烯醯胺/甲基丙烯酸鹽) (PMMN)，係以甲基丙烯醯胺 (MAM) 及甲基丙烯酸 (MAN) 為單體，在鹼性環境下經自由基聚合反應所合成的共聚物。另一為兩性共聚物，先以氯醋酸鈉與N-(4-乙烯苯基)-N,N-二甲基胺製備一N-(4-乙烯苯基)-N,N-二甲基乙酸銨(DMVBAE)之兩性單體。以DMVBAE和甲基丙烯酸經聚合反應得到聚(N-(4-乙烯苯基)-N,N-二甲基乙酸銨/甲基丙烯酸鹽) (PVM)；另外，DMVBAE與甲基丙烯醯胺、甲基丙烯酸可製得聚(N-(4-乙烯苯基)-N,N-二甲基乙酸銨/甲基丙烯醯胺/甲基丙烯酸鹽) (PVMM)。所得產物由IR、1H-NMR光譜確認其結構，GPC分析其分子量。利用電位滴定法得到高分子在不同pH值下的解離率及PMMN中單體組成比例。由PVM的1H-NMR光譜圖可知兩單體含量，而PVMM可經由元素分析法求得單體組成。
兩類型高分子添加於鈦酸鋇漿體，藉量測漿體黏度、記錄沈降行為、分析漿體粒徑、觀察生胚微結構及計算胚體密度來評估其分散效能並與PMAAN做為對照。結果顯示添加這些高分子可得到分散良好的漿體，最佳劑量均為2mg/g BT。由吸附實驗和粒子界達電位測定結果顯示PMMN(60)含60wt%甲基丙烯醯胺單體有最大的羧基吸附量及最低的界達電位值。PVM、PVMM為兩性高分子，在鹼性環境下較易吸附於粒子表面，其中PVMM含醯胺基更易吸附於粒子，吸附量大於PVM。這些高分子吸附於粒子上均可產生電荷斥力與立體阻障而使懸浮液達到穩定的狀態。引用DLVO理論計算粒子之總電位能，所得結果與實驗相符。IR、UV/vis光譜圖中官能基吸收峰的位移提供粒子與高分子交互作用的證據。量測溶液中鋇離子濃度， PMMN、PVM和PVMM結構中含四級胺和醯胺基等官能基較容易吸附於粒子上，吸附量增加或粒子表面有較大的高分子覆蓋率，可抑制鋇離子溶出，因此減少溶液中鋇離子濃度。添加PMMN、PVM及PVMM做為分散劑可得到較好的分散效果，粒子堆積緻密，經燒結後，可增加胚體介電常數值與降低介電損失值。

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