Polymers with a lightly cross-linked molecular structure are called elastomers.
The molecular chains can move relative freely between the cross-links giving them an elastic behavior.
Elastomers are used for rubber bands, tires, springs, etc.
Typical elastomers are rubber, silicone and polyurethane.
Plastic: Elastomers consist of molecular chains with light cross-links.
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
