General performance PVC resin is a white or yellow powder with a relative density of 1.35~1.45. The softness and hardness of the product can be adjusted by adding a plasticizer for PVC transparent board. Pure 4x8 pvc foam board has very low water absorption and permeability.
PVC has high hardness and mechanical properties, which increase with the increase of molecular weight and decrease with the increase of temperature. The mechanical properties of rigid PVC are good, and the elastic modulus can reach 1500~3000 MPa. The elasticity of soft PVC It is 1.5~15 MPa, the elongation at break is as high as 200%≤450%, and its friction performance is average, the static friction coefficient is 0.4~0.5, and the dynamic friction factor is about 0.23.
Thermal properties PVC thermal stability is very poor. It begins to decompose at 140°C. The melting temperature is 160°C. The linear expansion coefficient is small and refractory. The oxidation index is as high as 45.
Electrical properties PVC is a polymer with good electrical properties, but due to its large polarity, its insulation properties are not as good as PP and PE. The dielectric constant, dielectric loss tangent value and volume resistance are large, and the corona resistance is not good. It is generally suitable for medium, low voltage and low frequency insulating materials. Environmental protection performance PVC is resistant to most inorganic acids, alkalis, salts, and most organic solvents. Suitable for medicine and chemical anticorrosive materials.
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