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pvc板材的性能。一般性能 PVC樹脂為一種白色或淡黃色的粉末，相對密度為1.35-1.45。制品的軟硬程度可通過加入增塑劑的份數(shù)多少進(jìn)行調(diào)整。純PVC的吸水率和透氣性都很低。
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有較高的硬度和力學(xué)性能。并隨分子量的增大而提高，但隨溫度的升高而下降。硬質(zhì)PVC的力學(xué)性能好，其彈性模量可達(dá)1500-3000MPa。而軟質(zhì)的PVC的彈性1.5-15 MPa。但斷裂伸長率高達(dá)200%-450%。PVC的摩擦性一般，靜摩擦因數(shù)為0.4-0.5，動摩擦因數(shù)0.23。熱學(xué)性能 PVC的耐熱穩(wěn)定性十分差，140℃即開始分解，熔融溫度為160℃。PVC的線膨脹系數(shù)較小，具有難燃性，氧化指數(shù)高達(dá)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.
電學(xué)性能 PVC是一種電性能較好的聚合物，但由于本身的極性較大，電絕緣性不如PP和PE。 介電常數(shù)，介電損耗角正切值和體積電阻率較大，耐電暈性不好，一般適于中低壓和低頻絕緣材料。
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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