The excellent properties of the composites distinctly depend on the filler particles dispersion, which has close relationship with the surface treatment of filler particles. To improve the compatibility between the filler particles and the matrix, the surface of filler particles is generally treated with coating agents, which can be classified as “dispersants” and “coupling agents.” Coating calcite (CaCO₃) with dispersants is called a nonreactive treatment. The surface modification of CaCO₃ with coupling agents is called reactive treatment. In this study, physical, chemical, morphological, rheological, and mechanical analyses were conducted to determine the effect of reactive and nonreactive surface treatment agents on the dispersion of CaCO₃ in polypropylene/CaCO₃ composites. Both agents successfully made the surface of CaCO₃ hydrophobic. The results of this study revealed that, although stearic acid (SA) establishes stronger bonds with the calcite surface, isopropyl tristearyl titanate, unlike SA, improves the properties of the final product composite, which forms a bond at the polymer/filler interface.

中文翻译：

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比较反应性和非反应性处理对聚丙烯基复合材料中碳酸钙（方解石）填料分散特性的影响

复合材料的优异性能明显取决于填料颗粒的分散性，这与填料颗粒的表面处理密切相关。为了提高填料颗粒和基体之间的相容性，通常用涂层剂处理填料颗粒的表面，这些涂层剂可分为“分散剂”和“偶联剂”。用分散剂涂覆方解石（CaCO ₃）被称为非反应性处理。用偶联剂对CaCO ₃的表面改性称为反应处理。在这项研究中，进行了物理，化学，形态，流变和机械分析，以确定反应性和非反应性表面处理剂对CaCO ₃分散的影响。在聚丙烯/ CaCO ₃复合材料中。两种试剂均成功地使CaCO ₃表面疏水。这项研究的结果表明，尽管硬脂酸（SA）与方解石表面建立了更牢固的键合，但与SA不同的是，三硬脂基钛酸异丙酯改善了最终产品复合物的性能，该复合物在聚合物/填料界面处形成了键。