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在水相中对纳米碳酸钙悬浮液进行了湿法改性。抽提后改性纳米碳酸钙的红外光谱和热失重分析显示改性剂与纳米碳酸钙之间以化学键结合;将改性纳米碳酸钙应用到聚氯乙烯中,制得了增韧、增强及增刚的聚氯乙烯纳米复合材料。复合材料在保持加工性能的同时耐热性能得到提高。透射电镜分析显示改性纳米碳酸钙在基体中呈纳米级分散,扫描电镜分析显示复合材料冲击断面产生丝状屈服,表现出典型的韧性断裂特征。
The nano-CaCO3 suspension was wet-modified in the aqueous phase. After extraction, the infrared spectra and thermogravimetric analysis of the modified nano-CaCO3 show that the modifier is chemically bonded with the nano-CaCO3; the modified nano-CaCO3 is applied to the polyvinyl chloride to make toughening, strengthening and increasing Just polyvinyl chloride nanocomposites. The composite material improves the heat resistance while maintaining processability. Transmission electron microscopy analysis showed that the modified nano-CaCO3 was dispersed in the matrix at nanometer scale. Scanning electron microscopy analysis showed that the cross-section of the composite produced filamentous yielding, which showed typical ductile fracture characteristics.