中空玻璃微珠填充低密度聚乙烯材料的性能

Properties of Hollow Glass Beads Filled Low Density Polyethylene Composite

考察中空玻璃微珠(HGB)种类及用量、硅烷偶联剂种类及用量等对中空玻璃微珠/低密度聚乙烯(LDPE)复合材料密度及力学性能的影响。结果表明:玻璃微珠添加量为20份较适宜;偶联剂A-172对玻璃微珠处理效果优于KH550;当A-172用量达到1.0%时,复合材料综合力学性能最佳,其中冲击强度较处理前提高24%,拉伸强度较处理前提高18%;扫描电镜(SEM)表明A-172明显改善玻璃微珠与LDPE界面结合。中空玻璃微珠对LDPE的减重效果不如LDPE化学发泡法明显,但能较好兼顾"轻质"与力学性能要求。

The effects of hollow glass bead type and content , silane coupling agents type and content on density and mechanical properties of HGB/LDPE composite were investigated respectively. The experimental results showed that the appropriate content of HGB was 20 phr. And the treatment effect of A-172 was better than KH550. When the ratio of A-172 was 1.0 % , the best overall mechanical properties of composite were obtained. The impact strength of composite increased by 24 % and the tensile strength increased by 18 %. SEM micrograph showed that A-172 improved the interfacial bonding between HGB and matrix significantly. For weight loss, LDPE chemical foaming method was more effective than HGB filled LDPE. But the latter reached a better balance between light and the mechanical properties.