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- 2016
纳米MgO/高密度聚乙烯复合材料的性能
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Abstract:
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%。nano-MgO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。 Nano-MgO/high-density polyethylene (nano-MgO/HDPE) composites were prepared by melt blending method, and the mechanical properties of the composites were tested. The dispersity of nano-MgO in nano-MgO/HDPE composites was observed by SEM. The ultraviolet-shielding property, thermal stability and crystallization property of nano-MgO/HDPE composites were tested by ultraviolet-visible absorption spectra, TG and DSC respectively. The results show that although the addition of nano-MgO reduces the thermal decomposition temperature of HDPE, it improves the impact strength, flexural strength and ultraviolet-shielding property of HDPE. When the content of nano-MgO is 2wt%, the impact strength of nano-MgO/HDPE composite is 14% higher than that of pure HDPE. When the content of nano-MgO is 4wt%, the flexural strength of nano-MgO/HDPE composite is 18% higher than that of pure HDPE. The nano-MgO, which evenly distributed in nano-MgO/HDPE composites, promotes the crystallization of HDPE. 陕西省教育厅项目(14JK1162); 陕西省科学研究项目(2014K08-18)
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