通过比较选择聚丙烯酸钠为超细重质碳酸钙的最佳分散剂。
By comparison, polyacrylate sodium is an optimum dispersant for ultrafine ground calcium carbonate aqueous dispersions.
复合材料的结晶度随超细重质碳酸钙填充量的增加而有所降低，但复合材料的熔点变化不大。
The crystallinity of the composite decreased with the increase of the ultrafine ground calcium carbonate, the melting point of the composite had little change.
结果表明：超细重质碳酸钙在基体中基本实现了良好分散；
The results showed that the ultrafine ground calcium carbonate presented a good disperse in polypropylene composite.
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