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Reinforcing polypropylene with calcium carbonate of different morphologies and polymorphs

机译：用不同形态和多晶型物的碳酸钙增强聚丙烯

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The influence of calcium carbonate (CaCO_(3)) with different polymorphs (calcite and aragonite) and morphologies (granular and rod-like) on mechanical and crystallization properties of polypropylene (PP) was investigated. Meanwhile, these CaCO_(3) fillers coated with oleic acid were added in different contents to PP. The results indicate that the tensile strength, flexural strength, modulus, and crystallization property of the filler-treated samples are improved, but the impact strength decreased. The crystallinity of the composites is higher than that of neat PP. Moreover, in the rod shape filler-treated sample, in both whisker species, the mechanical properties of composites are superior to the particles filled. Differential scanning calorimetry, X-ray diffraction, and mechanical tests display that calcite whisker-reinforced composite has higher crystallization enthalpy, melting enthalpy, degree of crystallinity, and mechanical properties than aragonite whiskers and calcite particles filled composites.
机译：研究了具有不同多晶型物（方解石和文石）和形态（颗粒状和棒状）的碳酸钙（CaCO_（3））对聚丙烯（PP）的力学性能和结晶性能的影响。同时，将这些涂覆有油酸的CaCO_（3）填料以不同的含量添加到PP中。结果表明，填料处理后的样品的拉伸强度，弯曲强度，模量和结晶性能均得到改善，但冲击强度却降低了。复合材料的结晶度高于纯聚丙烯。此外，在棒状填料处理过的样品中，在两种晶须种类中，复合材料的机械性能均优于填充的颗粒。差示扫描量热法，X射线衍射和机械测试表明，方解石晶须增强的复合材料具有比文石晶须和方解石颗粒填充的复合材料更高的结晶焓，熔融焓，结晶度和机械性能。

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