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以铝钛复合偶联剂(OL-AT-1618)、钛酸酯偶联剂(NDZ-311)、硬脂酸(StA)为表面改性剂对高岭土(高岭土)进行表面改性。研究表明:PP/改性高岭土复合材料与PP/未改性高岭土复合材料相比,其缺口冲击强度可提高15%,拉伸强度提高7%。扫描电镜照片显示,改性高岭土在PP基体中分散均匀。用广角X射线衍射仪对PP的结晶状况进行表征,发现高岭土的填充量和偶联剂的用量对各衍射峰的位置几乎没有影响,但衍射峰强度略有变化。用差示扫描量热仪对PP的结晶速率进行研究,发现高岭土在较小的过冷度下可诱导PP结晶,使PP的结晶速率有所提高。
Kaolin (Kaolin) was surface modified with aluminum titanium composite coupling agent (OL-AT-1618), titanate coupling agent (NDZ-311) and stearic acid (StA) as surface modifiers. The results show that the notched impact strength of PP / modified kaolin composite can be increased by 15% and tensile strength by 7% compared with PP / unmodified kaolin composite. Scanning electron micrographs show that the modified kaolin is uniformly dispersed in the PP matrix. The crystal structure of PP was characterized by wide-angle X-ray diffractometer. It was found that the loading of kaolin and the amount of coupling agent had little effect on the position of each diffraction peak, but the intensity of diffraction peak changed slightly. The crystallization rate of PP was studied by differential scanning calorimeter. It was found that kaolin could induce PP crystallization under a little degree of supercooling, and the crystallization rate of PP increased.