【摘要】 基于图像法研究发泡PVC木塑材料的孔隙结构,并对孔隙率、中间层孔径分布、孔隙形状系数进行分析.研究结果表明:发泡PVC木塑材料为典型的层状结构,由致密表层和疏松内层构成,夹杂尺径为17.68~25.67μm的木质纤维.内层的孔隙率为73.54%~74.17%,在49.5~101.5μm区间内的孔隙占62.20%,孔隙尺径分布较为集中;孔隙形状系数为1.86,孔隙多为球形至椭球形.建议采取适当提高木纤维掺量或降低成型温度等措施,提高高温流体的黏性,改善孔隙完整性.更多还原

【Abstract】 The pore structure of foaming PVC wood-plastic materials was studied based on image method. The results showed that foaming PVC wood-plastic materials have typical layered structure. And it was composited by the dense surface and the loose inner layer which mixed foot 17.68~25.67 μm of wood fiber. The porosity rate area of inner layer was 73.54%~74.17%,and the 62.2% of pore size was in 49.5~101.5 μm. Pore size distribution was quite concentrated. Pore shape factor was 1.86,and it indicated that the pore shape is spherical to ellipsoidal. The analysis results showed that appropriately increasing content wood fiber or lower temperature measures are necessary to increase the viscosity of the fluid in high temperature and improve porosity integrity.更多还原