PVC／POE-g-MAH合金的力学性能研究

摘要

以通用型PVC树脂为基体，在增塑剂DOP的作用下，使用连续的POE—g-MAH，通过双螺杆挤出机对其进行共混改性，研究了POE-g—MAH的含量对PVC复合材料的力学性能的影响。结果表明：合金的整体力学性能出现了由脆．韧的明娃转变。在其拉伸强度、断裂仲长率、缺口冲击强度及无缺口冲击强度方面作用非常明显。随着POE—g—MAH的增加，材料的拉伸强度呈下降趋势，而断裂伸长率先增加后降低再增加，在POE—g—MAId量达到5％时，性能达到最佳值。缺口冲击强度及无缺口冲击强度也呈现增强趋势。%Took the general PVC resin as the substrate, under the plasticizer DOP function, used continual POE-g-MAH, carried on the blending modification through the double screw rod extruding machine to it, had studied the POE-g-MAH content to the PVC compound materials mechanical properties influence. The results showed that： The alloy overall mechanical properties appeared transformed obviously by crisp - strong Bolivia. In its longitudinal strength, the break elongation ratio, the gap shock strength and the non-gap shock strength aspect affects is obvious. Along with POE-g-MAH increase, the material longitudinal strength assumes the declining trend, but after the rupture elongation takes the lead increases, to reduce increases again, when the POE-g-MAH quantity achieves 5 %, the performance achieves the best value. The gap shock strength and the non-gap shock strength also present the enhancement tendency.