Polypropylene (PP), also known as polypropylene, is a thermoplastic polymer used in a variety of applications.
It is produced by polymerization of chain growth from monomer propylene.
Polypropylene belongs to the group of polyolefins and is partially crystalline rather than polar.
Its features are similar to polyethylene, but it is slightly harder and more heat resistant.
It is a white, mechanically fractured material and has a high chemical resistance. Polypropylene is the plastics of second-hand goods (after polyethylene) and is often used in packaging and labels.
In 2013, the global polypropylene market was about 55 million tonnes.