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通过熔融共混法制备了纳米MgO/高密度聚乙烯(nano-MgO/HDPE)复合材料,并对该复合材料的力学性能进行了测试,用SEM对nano-MgO在nano-MgO/HDPE复合材料中的分散情况进行了观测,通过紫外可见光谱研究了复合材料的紫外屏蔽性能,通过TG研究了复合材料的热稳定性,通过DSC研究了复合材料的结晶性能。结果表明:虽然nano-MgO的引入使HDPE的热分解温度有所降低,但nano-MgO的引入提高了HDPE的冲击强度、弯曲强度及紫外屏蔽性能。当nano-MgO含量为2wt%时,nano-MgO/HDPE复合材料的冲击强度比纯HDPE高14%。当nano-MgO含量为4wt%时,nano-MgO/HDPE复合材料的弯曲强度比纯HDPE高18%。nanoMgO在nano-MgO/HDPE复合材料中的分散均匀,且nano-MgO的引入可以促进HDPE的结晶。
The nano-MgO / high density polyethylene (nano-MgO / HDPE) composites were prepared by melt blending method. The mechanical properties of the nano-MgO / HDPE composites were tested. The dispersion of the composites was observed. The UV shielding properties of the composites were studied by UV-vis spectroscopy. The thermal stability of the composites was investigated by TG. The crystallization properties of the composites were studied by DSC. The results show that although the thermal decomposition temperature of HDPE is decreased with the introduction of nano-MgO, the introduction of nano-MgO improves the impact strength, flexural strength and UV shielding properties of HDPE. When the content of nano-MgO is 2wt%, the impact strength of nano-MgO / HDPE composite is 14% higher than pure HDPE. When the content of nano-MgO is 4wt%, the flexural strength of nano-MgO / HDPE composites is 18% higher than pure HDPE. nanoMgO nano-MgO / HDPE composite material dispersed evenly, and the introduction of nano-MgO can promote the crystallization of HDPE.