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How About The Performance Of Pvc Sheet, Do You Know ?

Aug 22, 2017

Polyvinyl chloride (PVC) character is slightly yellow translucent, shiny. Transparency is better than polyethylene, polypropylene, worse than polystyrene, with the amount of different additives, divided into soft, hard polyvinyl chloride,  soft and tough, feel sticky, hard hardness is higher than low-density polyethylene, And lower than the polypropylene, in the inflection will appear whitening phenomenon. 

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Common products: sheet, pipe, soles, toys, doors and windows, wire sheath, stationery and so on. Is a polymer material that uses a chlorine atom to replace one hydrogen atom in polyethylene.

General performance PVC resin is a white or light yellow powder, the relative density of 1.35-1.45. The soft and hard degree of the product can be adjusted by adding a plasticizer.

Mechanical properties PVC has a high hardness and mechanical properties. And increased with the increase of molecular weight, but with the temperature rise. Hard PVC mechanical properties, and its elastic modulus up to 1500-3000MPa. While the soft PVC elasticity of 1.5-15 MPa. But the elongation at break up to 200% -450%. PVC friction in general, static friction factor of 0.4-0.5, dynamic friction factor of 0.23.

Thermal properties of PVC heat stability is very poor, 140 ℃ began to break down, the melting temperature of 160 ℃. PVC linear expansion coefficient is small, with flame retardant, oxidation index of up to 45 or more. So in the processing process need to add heat stabilizer, and need to ensure product performance.

Electrical properties PVC is a good electrical properties of the polymer, but because of its large polarity, electrical insulation than PP and PE. Dielectric constant, dielectric loss tangent and volume resistivity, resistance to corona is not good, generally suitable for low pressure and low frequency insulation materials.

Environmental performance PVC can withstand most of the inorganic acid, alkali, salt, most organic solvents. Suitable for medicine, chemical anti-corrosion materials.


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