煤粉对PVC材料力学性能的影响

Effect of pulverized coal on PVC material mechanical properties

将煤粉与PVC塑料混炼制得煤粉/PVC复合材料,研究了煤粉含量和分布状态对PVC材料力学性能的影响。结果表明,煤粉(平均粒径34.5μm)能够均匀地分布于PVC塑料中;当煤粉含量达到7%时,所得复合材料的综合力学性能最佳,其中拉伸强度为66MPa,弯曲强度为68MPa,断裂伸长率为84%,冲击强度可达16.46kJ/m2,邵氏硬度为87.16。煤粉之所以能够增强PVC材料的力学性能,主要是由于均匀分布的煤粉承担了应力在复合材料中的传递。

The pulverized coal/PVC composite was prepared by adding pulverized coal into PVC,and the effects of pulverized coal＇s content and distribution on mechanical properties of PVC were studied.The results show that pulverized coal（average particle diameter 34.5μm） can be distributed homogeneously in PVC plastic;when the pulverized coal amount to 7% of the composite,the PVC composite has the best mechanical properties,the tensile strength of PVC composite was 66MPa,the yield strength was 68MPa,the elongation at break was 84%,the impact strength reaches to 16.46kJ/m2,and the shore hardness is 87.16.The main reason for this is that pulverized coal that are uniformly distributed assume the load transfer in the composite.