Information About

Elastomer
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Elastomers are usually Thermoset s (requiring vulcanization) but may also be Thermoplastic (see Thermoplastic Elastomer ). The long polymer chains Cross-link during curing and account for the flexible nature of the material. The molecular structure of elastomers can be imagined as a 'spaghetti and meatball' structure, with the meatballs signifying cross-links.

Examples of elastomers:

  • Natural Rubber

  • Polyisoprene

  • ---Butyl Rubber (copolymer of isobutylene and isoprene)

  • Polybutadiene

  • --- Styrene Butadiene Rubber or SBR (copolymer of polystyrene and polybutadiene)

  • ---Nitrile Rubber (copolymer of polybutadiene and acrylonitrile), also called Buna N Rubbers

  • Chloroprene Rubber, polychloroprene, also called Neoprene

  • Silicone RTV

  • FKM Viton ®, Tecnoflon®(copolymer of vinylidene fluoride and hexafluoropropylene)

  • Santoprene®

  • Fluorosilicone Rubber

  • EPM and EPDM Rubber (ethylene propylene rubber, a copolymer of polyethylene and polypropylene)

  • Polyurethane rubber

  • Resilin

  • Polyacrylic rubber (ABR)

  • Epichlorohydrin rubber (ECO)

  • Polysulfide Rubber

  • Chlorosulfonated Polyethylene (CSM), (Hypalon®)



REFERENCES

  • Budinski, Kenneth G., Budinski, Michael K., ''Engineering Materials: Properties and Selection'', 7th Ed, 2002. ISBN 0-13-030533-2.

  • Expanation of properties and application of some elastomers: http://www.timcorubber.com/definitions/index.asp

  • Comparison table of elastomer proberties: http://www.timcorubber.com/definitions/Comparison_to_Elastomer_Properties.pdf