pvc板材的性能。一般性能 PVC树脂为一种白色或淡黄色的粉末，相对密度为1.35-1.45。制品的软硬程度可通过加入增塑剂的份数多少进行调整。纯PVC的吸水率和透气性都很低。
Properties of PVC panels. General performance PVC resin is a white or yellowish powder, with a relative density of 1.35-1.45. The degree of hardness of the product can be adjusted by adding a portion of the plasticizer. The water absorption and permeability of pure PVC are very low.
PVC有较高的硬度和力学性能。并随分子量的增大而提高，但随温度的升高而下降。硬质PVC的力学性能好，其弹性模量可达1500-3000MPa。而软质的PVC的弹性1.5-15 MPa。但断裂伸长率高达200%-450%。PVC的摩擦性一般，静摩擦因数为0.4-0.5，动摩擦因数0.23。热学性能 PVC的耐热稳定性十分差，140℃即开始分解，熔融温度为160℃。PVC的线膨胀系数较小，具有难燃性，氧化指数高达45以上。

PVC has higher hardness and mechanical properties. And it increases with the increase of molecular weight, but decreases with the increase of temperature. The mechanical properties of hard PVC are good, and its modulus of elasticity is up to 1500-3000MPa. While the soft PVC is elastic, 1.5-15 MPa. But the elongation at break is as high as 200%-450%. The friction of PVC is normal, the static friction factor is 0.4-0.5, and the dynamic friction factor is 0.23. The thermal properties of PVC are very poor in thermal stability, which begins at 140 DEG C and the melting temperature is 160 degrees centigrade. The coefficient of linear expansion of PVC is small, it is nonflammable and the oxidation index is higher than 45.
电学性能 PVC是一种电性能较好的聚合物，但由于本身的极性较大，电绝缘性不如PP和PE。 介电常数，介电损耗角正切值和体积电阻率较大，耐电晕性不好，一般适于中低压和低频绝缘材料。
Electrical property PVC is a kind of polymer with good electrical properties, but because of its polarity, the electrical insulation is not better than PP and PE. Dielectric constant, dielectric loss tangent and volume resistivity are large, and corona resistance is not good. It is generally suitable for medium, low voltage and low frequency insulation materials.
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