Polypropylene is a plastic polymer with an extremely wide range of applications. Currently, it is the most popular plastic. As with all other polymolecular compounds, wide application is due to the properties of the polymer.
physical characteristics
Polypropylene density 0.91 g/cm. This is the lowest density value among all known plastics. Despite the low density, the material is quite reliable. It has high strength, resistance to abrasion and high temperature. In terms of strength, this material is superior to polyethylene, which is loved by many factories.
Plastic begins to soften at a temperature of 140-160 degrees. When the temperature reaches 175 degrees, the material melts. In everyday life, such temperatures are rare. You can sterilize products with hot steam or pour boiling water into plastic containers. Polypropylene products are not suitable for industrial workshops with high temperatures.
But with frost resistance, not everything is so smooth. Pure polypropylene begins to lose strength at temperatures from -5 to -15 degrees. This is rather weak for Russia: our climatic conditions require frost-resistant materials. Therefore, ethylene and other impurities are added to the composition, which increase frost resistance. Sudden temperature changes do not reduce the strength of the material.
