General properties PVC resin is a white or light yellow powder with a relative density of 1.35-1.45. The hardness of the product can be adjusted by adding plasticizers.
Mechanical properties PVC has high hardness and mechanical properties. And increase with the increase of molecular weight, but decrease with the increase of temperature. Rigid PVC has good mechanical properties, and its elastic modulus can reach 1500-3000MPa. The elasticity of soft PVC is 1.5-15 MPa. But the elongation at break is as high as 200%-450%. The friction of PVC is general, the static friction coefficient is 0.4-0.5, and the dynamic friction coefficient is 0.23.
Thermal properties The thermal stability of PVC is very poor, it begins to decompose at 140 °C, and the melting temperature is 160 °C. The linear expansion coefficient of PVC is small, it is flame retardant, and the oxidation index is as high as 45 or more. Therefore, heat stabilizers need to be added during processing to ensure the performance of the product.
Electrical properties PVC is a polymer with better electrical properties, but due to its greater polarity, its electrical insulation is not as good as PP and PE. The dielectric constant, dielectric loss tangent and volume resistivity are relatively large, and the corona resistance is not good. It is generally suitable for medium and low voltage and low frequency insulating materials.
Environmental performance PVC is resistant to most inorganic acids, alkalis, salts, and most organic solvents. Suitable for medicine, chemical anti-corrosion materials.