Elastomer is defined as a macromolecular material (natural or synthetic polymer) which subjected to high deformation (stretching with elongation up to 5 or 10 times the initial length) within a specific temperature range after the applied stress removal returns to the shape and the original size.

Chemical characteristics

The main chemical characteristics of the elastomers are:

  • consist of linear molecules with a high molecular weight;
  • presence along the polymeric molecule of reactive groups that allow cross-linking (equivalent to vulcanization);
  • ability to accept reinforcing charges and to add satisfactory mechanical properties after cross-linking.

Mechanical characteristics

Elastomers, depending on their nature, may possess different mechanical characteristics such as:

  • flexibility at room temperature;
  • negligible permanent deformation;
  • high breaking load;
  • abrasion resistance;
  • resistance to high temperatures;
  • tear resistance;
  • resistance to oxidation and ozone;
  • resistance to aging and light;
  • resistance to solvents and oil.

Related keywords

  • Thermoplastic elastomer