聚丙烯工程化研究

Study of Engineering of Polypropylene

采用纳米填充、交联和转晶的复合技术对聚丙烯进行了改性 ,优选了纳米碳酸钙为填料。当 β成核剂用量为 0 5 %、助交联剂为 3 %时 ,复合材料的综合性能达到最好 ,接近普通工程塑料的各项力学性能。红外光谱分析和熔体质量流动速率的测定表明 ,复合材料体系产生了微交联 ;DSC分析发现 ,PP材料的聚集态结构中含有

In this paper,Polypropylene was modified by composite technologies of nano-meter filling,crosslinking and crystal transformation,taking nano-meter calcium carbonate as the optimum filler.The overall properties of the composite were the best when the content of β-nucleating agent was 0.5 % and the content of aid crosslinking agent was 3 %,the property of the composite came close to that of common engineering plastics.The analysis of IR spectrum and melt flow index showed that the composite had a micro-crosslinking structure,and the analysis of DSC discovered there was β-spherulite in the aggregate structure of the composite of PP.