The toughness and the rheology of p

本文研究了以硬脂酸为界面改性剂的聚丙烯（PP）-碳酸钙（CaCO3）纳米化合物的韧性和流变性。纳米复合材料的混合是用双螺杆挤出机进行的。基准样品（未处理）和硬脂酸处理过的CaCO3纳米颗粒通过傅立叶变换红外（FTIR）光谱进行了表征。通过冲击试验，拉伸试验，扫描电子显微镜（SEM），流变学分析和差示扫描量热法（DSC）对纳米化合物进行了表征。使用界面改性剂（挤出机料斗中的硬脂酸）的纳米化合物可提高断裂伸长率和抗冲击性。含硬脂酸的纳米化合物表现出最佳的分散状态。硬脂酸有助于降低作为润滑剂的复数粘度，降低碳酸钙（NCC）纳米颗粒与PP链之间的摩擦力。具有更好分散状态的纳米化合物的结晶温度与PP均聚物非常相似。POLYM。ENG。SCI。，59：E279–E285，2019.©2019塑料工程师协会

本文研究了聚丙烯（PP）+碳酸钙（CaCO3）纳米组团的韧性和流变学，该纳米组以硬脂酸为界面改性剂。用双螺杆挤出机对纳米复合物进行复合。基准样品（未经处理）和石酸处理CaCO3纳米粒子的特点是四叶变红外（FTIR）光谱。纳米计算机的特点是冲击试验、拉伸试验、扫描电子显微镜（SEM）、流变分析和差分扫描热量测量（DSC）。在纳米组与接口改性（挤出机料斗中的石脑酸）中，拉长-断裂和抗冲击性增加。与石酸的纳米组合显示出最佳的分散状态。石酸有助于减少作为润滑剂的复杂粘度，减少碳酸钙（NCC）纳米颗粒和PP链之间的摩擦力。具有更好分散状态的纳米组合具有与PP同聚体非常相似的结晶温度。波利姆。ENG. SCI.， 59：E279+E285， 2019.©2019年塑料工程师协会

The toughness and the rheology of polypropylene (PP)‐calcium carbonate (CaCO3) nanocompounds using stearic acid as an interface modifier were studied in this work. Compounding of the nanocomposites was carried out with a twin‐screw extruder. The benchmark samples (untreated) and stearic acid‐treated CaCO3 nanoparticles were characterized by Fourier transform infrared (FTIR) spectroscopy. The nanocompounds were characterized by impact test, tensile test, scanning electron microscopy (SEM), rheological analysis, and differential scanning calorimetry (DSC). The elongation‐at‐break and impact resistance were increased in nanocompounds with interface modifier (stearic acid in hopper of the extruder). Nanocompounds with stearic acid showed the best dispersion state. Stearic acid helps to reduce complex viscosity acting as a lubricant, reducing frictional forces between nanoparticles of calcium carbonate (NCC) and PP chains. Nanocompounds with better dispersion state had crystallization temperatures very similar to the PP homopolymer. POLYM. ENG. SCI., 59:E279–E285, 2019. © 2019 Society of Plastics Engineers<br>