Pvc material properties

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Pvc material properties

Hard polyvinyl chloride (PVC-U) pipe fittings for water supply

Density 1380 kg/m3

Young's modulus of elasticity (E) 2900-3400 MPa

Tensile strength (σt) 50-80 MPa

Elongation @ break 20-40%

Notch test 2-5 kJ/m2

Glass transition temperature 87 ° C

Melting point 212 ° C

Vicat B1 85°C

Thermal conductivity (λ) 0.16 W/m.K

Thermal expansion coefficient (α) 8 10-5 /K

Heat capacity (c) 0.9 kJ/(kg·K)

Water absorption rate (ASTM) 0.04-0.4

Refractive index hard molded product 1.52~1.55

Price 0.5-1.25 €/kg

Polyvinyl chloride is the most widely used flame retardant and is therefore widely used in fire protection applications. However, polyvinyl chloride releases hydrogen chloride and other toxic gases such as dioxins during combustion.

The burning of PVC is divided into two steps. First, hydrogen chloride gas and a diene containing a double bond are decomposed by burning at 240 ° C to 340 ° C, and then carbon combustion occurs at 400 to 470 ° C.

It is one of the most productive plastic products in the world. It is inexpensive and widely used. The polyvinyl chloride resin is white or light yellow powder. Different additives can be added according to different purposes, and polyvinyl chloride plastic can exhibit different physical properties and mechanical properties. A variety of hard, soft and transparent articles can be made by adding an appropriate amount of plasticizer to the polyvinyl chloride resin.

The density of pure polyvinyl chloride is 1.4 g/cm3, and the density of polyvinyl chloride plastic parts to which plasticizers and fillers are added is generally 1.15-2.00 g/cm3.

Rigid PVC has good tensile, flexural, compressive and impact resistance properties and can be used alone as a structural material.

The softness, elongation at break, and cold resistance of the soft polyvinyl chloride increase, but the brittleness, hardness, and tensile strength are lowered.

Polyvinyl chloride has good electrical insulation properties, can be used as a low-frequency insulation material, and its chemical stability is also good. Due to the poor thermal stability of polyvinyl chloride, long-term heating will cause decomposition, release HCL gas, and discolor the polyvinyl chloride. Therefore, its application range is narrow, and the use temperature is generally between -15 and 55 °C.