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Properties And Applications Of Propylene Plastics


Propylene consttiutes a very important part of thermoplastics. Because of propylene’s specific properties over other thermoplastic materials, it finds very specific applications in engineering and industry. In here, we explained the general properties of propylenes and applications that propylene is used in.

Propylene bottle caps.

What Is Propylene?

Injection molding is one of the most important plastic part production technique. If a plastic material has very good characteristic to produce parts by injection molding from it, it can be a very important material polymer realm. So propylene has very good ability to be processed in injection molding. Propylene has an acronym that is ‘PP’. Propylene is produced in isotactic, atactic and syndiotactic structures. In general applications, isotactic structure of propylene is the most important one. Propylene has very specific properties to be used in such specific applications;

  • Lightweight: Propylene is most lightweight plastic in polymer realm. Also propylene has very good strength-to-weigth ratio which provides very wide ranges of applications in engineering, where lightweigth is important.
  • High Melting Point: High melting point of propylene gives an importance in where sterilization of plastic materials is important. Sterilization made at high temperatures and plactic like propylene must withstand to these high temperatures.
  • Fatigue Strength: Hinges that has no joints are made by propylenes generally. This is because the property of fatigue strength of propylene which gives physical property to withstand high cycles of load.

Also propylenes properties are nearly same with HDPE. Propylenes are also used in lots of applications that the parts are produced with injection molding.

Molecular structures of propylene.

What Are The Properties Of Propylene?

The production method of propylene plastics is addition polmerization. Degre of crystallinity of propylene can be somewhat high, but it can change with process. Elasticity of propylene also changes dramatically. Elongation of propylene is around 10-500%. Tensile strength of propylene is 35MPa and modulus of elasticity is around 1400 MPa. Melting temperature of propylene is around 176C. Chemical representation of propylene is (C3H6)n. ‘n’ represents the monomer number in propylene chain.

These are the general informations about ptopylene. Do not forget to leave your comments and questions below about propylene and it applications and properties below. Your precious feedbakcs are very important for us.

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