【摘要】 对比了模压法及直接切片法制样,以及用铬酸-硫酸溶液、盐酸、乙酸乙醇等不同方法蚀刻所得的扫描电子显微镜图象,结果表明直接切片法比模压法制的试样更能反映CaCO₃/聚丙烯界面形态及CaCO₃的分布情况;试样经盐酸或乙酸乙酯蚀刻后的界面形态显露更为清楚,后者并能显露出聚丙烯酸酯在界面及基体中的分布状态;铬酸-硫酸蚀刻面主要揭示晶相与非晶相连CaCO₃粒子的分布及晶相的形态。受潮CaCO₃导致加工过程出现空穴,减压亦不能消除,受氧化的聚丙烯和聚丙烯酯均有利于CaCO₃粒子与聚丙烯的粘结。更多还原

【Abstract】 Several approaches of sample preparation were tested for revealing the interfacial morphology of heavy CaCO₃/PP systems by SEM. The results showed that the cut samples are better than the molded samples for this purpose. Etched with HCI or CH₃COOC₂H₅ showed the interfacial morphology clearly.Moistened CaCO₃ could cause cavitation under processing and it could not be improved by vacuum. Both oxidized PP and polyacrylate could make CaCO₃ particles and PP matrix adhere tightly. The flexible polyacrylate would improve the impact toughness of CaCO₃ systems.更多还原