纳米抗静电无卤阻燃PE–UHMW复合材料的研制

Preparation of Antistatic and Halogen-Free Flame Retardant PE–UHMW Composites via Nanotechnology

利用偶联接枝对纳米炭黑粒子表面处理,通过反应型增容载体载附纳米炭黑,将处理后的纳米炭黑及纳米复配阻燃剂用于改性超高分子量聚乙烯(PE–UHMW),制备出纳米抗静电无卤阻燃PE–UHMW复合材料。通过体积电阻率测试、燃烧性能测试、热重分析及扫描电子显微镜分析对该材料的导电性能、阻燃性能、热性能等进行了研究。结果表明,纳米炭黑分布在PE–UHMW球晶间缝隙处和球晶内微纤间缝隙处的非晶区内,形成了纳米级双导电网络,这种立体穿插纳米尺度均匀分布,在低炭黑含量情况下就形成稳定的导电通路,起到了抗静电作用;制备的纳米抗静电无卤阻燃PE–UHMW复合材料,其燃烧时形成高效、致密、厚实的炭层,可有效地隔绝空气,起到阻燃作用。

Antistatic and halogen-free flame retardant PE–UHMW composites filled with nano carbon and nano complex flame retardant were prepared via nanotechnology. Nano carbon black was surface modified and attached on the polyolefin to be well dispersed in the PE–UHMW. Moreover,volume resistance, flame retardancy,TG and SEM test were used to study the physical and electrical properties of composites.SEM photographs reveal that carbon black is dispersed in the amorphous layer and the phases between the spherulites,forming the electric networks in a particular low level. What is more, the results illustrate that antistatic phase is well formed with the cooperation between nano carbon black and antistatic materials. The carbon black dispersed selectively in the polyolefin with low molecular weight can still perform as the carbon phase to improve the carbonization of the composites.