General performance PVC resin is a white or light yellow powder with a relative density of 1.35-1.45. The hardness and softness of the product can be adjusted by adding plasticizer.
In terms of mechanical properties, PVC board has high hardness and mechanical properties. And it increased with the increase of molecular weight, but decreased 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 23。
In terms of thermal properties, the thermal stability of PVC board is very poor. It begins to decompose at 140 ℃ and the melting temperature is 160 ℃. PVC has a small coefficient of linear expansion, is flame retardant, and its oxidation index is more than 45. Therefore, it is necessary to add heat stabilizer in the processing process to ensure the performance of the product.
In terms of electrical properties, PVC board is a polymer with good electrical properties, but its electrical insulation is not as good as PP and PE due to its large polarity. 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 insulating materials.
In terms of environmental performance, PVC board can withstand most inorganic acids, alkalis, salts and most organic solvents. Suitable for pharmaceutical and chemical anti-corrosion materials.
