This polyolefin is readily formed by polymerizing propylene with suitable catalysts, generally aluminum alkyl and titanium tetrachloride. Polypropylene properties vary according to molecular weight, method of production, and the copolymers involved. Generally polypropylene has demonstrated certain advantages in improved strength, stiffness and higher temperature capability over polyethylene. Polypropylene has been very successfully applied to the forming of fibers due to its good specific strength which is why it is the single largest use of polypropylene. Polypropylene also happens to be one of the lightest plastics available with a density of 0.905 g/cm².
ADVANTAGES:
Homopolymer
Processability, Good
Food Contact Acceptable
Stiffness, Good
Impact Resistance, Good
Copolymer
Flow, High
Impact Resistance, High
Chemically Coupled
DISADVANTAGES AND LIMITATIONS:
Degraded by UV
Flammable, but retarded grades available
Attacked by chlorinated solvents and aromatics
Difficult to bond
Several metals accelerate oxidative degrading
Low temperature impact strength is poor
TYPICAL APPLICATIONS:
Automotive Applications
Household Goods
Film
Containers
Appliances
Packaging
Electrical/Electronic Applications
Industrial Applications
General Purpose
 Industrial products |  Idustrial products |
Overmolded parts |
