空心玻璃微珠增韧高密度聚乙烯

Hollow Glass Beads Toughened High Density Polyethylene

采用悬臂梁缺口冲击、DSC、SEM 等方法研究了空心玻璃微珠(HGB)用量、粒径大小、偶联剂处理和基体韧性等因素对高密度聚乙烯(PE-HD)/HGB 复合材料冲击强度和热性能的影响。结果表明:复合材料的冲击强度首先随 HGB 含量的增加而增大,当 HGB 用量超过一定值后,冲击强度又随 HGB 含量的增加而减小。HGB 的粒径越小,增韧效果越好,当粒径较大时,增韧作用不明显。偶联剂可以明显改善 HGB 在基体中的分散,进而达到较好的增韧效果。对于 PE-HD/HGB 复合材料,要求基体的最低冲击强度为5.2 kJ/m^2。

Hollow glass beads （HGB） were used to improve the mechanical properties of high-density polyethylene （PE-HI））. The effect of HGB content, mean diameter, coupling agent treatment, and the toughness of the PF-HD matrix on the structure and mechanical properties of PE-HD/HGB blends were studied using Izod impact, differential scanning calorimetry （DSC）, and scanning electron microscopy （SEM） tests. The notched impact strength of the blends increased gradually at first and then decreased with increasing HGB content. The smaller the mean diameter of HGB, the higher the notched impact strength. Surface treatment of the coupling agent improved the dispersion of HGB in PF-HI） matrix and thus improved the toughness. The notched impact strength of the PE-HI） matrix should be higher than 5.0 kJ/m^2 in order to obtain tough PE-HD/HGB blends.