1. General performance: 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 plasticizer. Pure PVC has very little water absorption and air permeability.
2. Mechanical properties: Mechanical properties PVC has high hardness and mechanical properties. And it increases with the increase of molecular weight, but decreases with the increase of temperature. Hard 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.
3. Thermal properties: The heat stability of PVC is very poor, it starts to decompose at 140℃, and the melting temperature is 160℃. PVC has a small linear expansion coefficient, is flame retardant, and has an oxidation index of more than 45.
4. Electrical properties: PVC is a polymer with good electrical properties, but due to its large polarity, its electrical insulation is not as good as PP and PE. The dielectric constant, dielectric loss tangent and volume resistivity are large, and the corona resistance is poor. It is generally suitable for medium and low voltage and low frequency insulation materials.
5. Environmental performance: PVC can withstand most inorganic acids, alkalis, salts, and most organic solvents. Suitable for pharmaceutical and chemical anticorrosion materials.
