engineering fundamentals
Polypropylene: Copolymer: Unfilled, Impact Modified
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Glossary » Materials » Polymers » Polypropylene » Unfilled, Impact Modified
Unfilled, Impact Modified PP is a subcategory of Polypropylene. The additative is added during the manufacturing process. Its elastic modulus ranges from 50 to 150 MPa. Its flexural modulus ranges from 60 to 160 MPa. Its tensile strength ranges from 3500 to 5000 MPa at break. Its flexural strength ranges from 4000 to 6000 MPa. Its compressive strength ranges from 3500 to 6000 MPa. Its elongation at break ranges from 200 to 700 %. Its hardness ranges from 50 to 60 Rockwell R. Its specific gravity ranges from 0.88 to 0.905. Its coefficient of thermal expansion ranges from 68 to 95 x 10-6/°C. Its molding pressure ranges from 10 to 20 MPa.

Polypropylene, also known as PP, is a thermoplastic, (crystalline), polymer. Common trade names are Marlex HGL and Fortilene 1800 series (FDA materials). copolymer Its key attributes are high lubricity, high resistance to flexing (excellent material for living hinges), excellent dielectric strength and chemical resistance, good impact strength, and high solvent resistance. It is inexpensive and electroplatable, but it is difficult to paint, print on, or bond to. It will be attacked by fuming nitric acid and degraded by UV and ionizing radiation. PP can be used to make medical syringes, beakers, and parts for auto interiors.
Additional Information
Other common Polypropylene (PP) include Unfilled PP, 10 - 40% Talc Filled PP, 10 - 40% Calcium Carbonate Filled PP, 10 - 30% Glass Fiber Reinforced PP, 10 - 50% Mica Filled PP, 40% Glass Fiber Reinforced PP, 20 - 30% Long Glass Fiber Reinforced PP, 40% Long Glass Fiber Reinforced PP, 30% Random Glass Mat PP, Impact Modified, 40% Mica Filled PP, 30% PAN Carbon Fiber EMI Shielding (conductive) PP, Unfilled PP, 10 - 20% Glass Fiber Reinforced PP, and 10 - 40% Talc Filled PP.
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