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ENGINEERING PLASTICS

Polypropylene (PP)

Polypropylene (PP) Datasheet (General Overview) Chemical Structure: Physical Properties: Mechanical Properties: Property Value Tensile Strength 30 – 40 MPa (4,350 – 5,800 psi) Yield Strength 25 – 35 MPa (3,600 – 5,075 psi) Elongation at Break 500 – 1,000% Young’s Modulus 1,500 – 2,500 MPa (218,000 – 362,500 psi) Hardness (Rockwell R) 70 – 110 […]

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Polypropylene (PP) Datasheet (General Overview)

Chemical Structure:

  • Polymer Type: Thermoplastic polymer

Physical Properties:

  • Density: 0.89 – 0.91 g/cm³
  • Melting Point: 160 – 166°C (320 – 331°F)
  • Water Absorption: < 0.01%

Mechanical Properties:

PropertyValue
Tensile Strength30 – 40 MPa (4,350 – 5,800 psi)
Yield Strength25 – 35 MPa (3,600 – 5,075 psi)
Elongation at Break500 – 1,000%
Young’s Modulus1,500 – 2,500 MPa (218,000 – 362,500 psi)
Hardness (Rockwell R)70 – 110

Thermal Properties:

  • Glass Transition Temperature (Tg): -20 to -10°C (-4 to 14°F)
  • Heat Deflection Temperature (HDT): 60 – 100°C (140 – 212°F)
  • Coefficient of Thermal Expansion: 100 – 150 x 10^(-6) /°C

Electrical Properties:

  • Dielectric Strength: 40 – 60 kV/mm
  • Volume Resistivity: 10^16 – 10^18 ohm·cm

Chemical Resistance:

  • Resistant to acids, bases, and most organic solvents.
  • Sensitive to some aromatic hydrocarbons.

Additional Features:

  • Machinability: Polypropylene is easily machined and fabricated.
  • Weldability: Suitable for various welding methods, including hot plate welding and ultrasonic welding.
  • UV Resistance: PP has good resistance to UV radiation.

Applications:

  • Packaging: PP is widely used in packaging materials, including containers, bottles, and films.
  • Automotive Parts: Bumpers, interior components, and various automotive applications.
  • Medical Devices: Laboratory equipment, medical containers, and disposable syringes.
  • Consumer Goods: Furniture, toys, and various household items.
  • Industrial Applications: Pipes, fittings, and various components in industrial settings.

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