Elastomers are polymers with highly elastic properties and viscosity. Rubber or elastomer is any elastic material that can stretch to sizes many times its initial length ( elastomeric thread ), and, what is important, return to its original size when the load is removed.
Not all amorphous polymers are elastomers. Some of them are thermoplastics . It depends on their glass transition temperature : elastomers have low glass transition temperatures, and thermoplastics have high. (This rule only works for amorphous polymers, not crystallized ones.)
Also called the elastomer part of the shock absorber , acting as a damper in the spring-elastomeric forks .
Elastomer Examples
Typical elastomers are various rubbers and rubbers .
Unsaturated rubbers that can be vulcanized with sulfur compounds:
- Natural rubber .
- Synthetic Polyisoprene ( IR , Polyisoprene, SKI ):
- Butyl rubber ( IIR , isobutylene-isoprene copolymer).
- Halogenated butyl rubber - chlorobutyl rubber ( CIIR, Chloro Butyl Rubber ) and bromobutyl rubber ( BIIR, Bromo Butyl Rubber ).
- Butadiene rubber ( BR, SKB ):
- Styrene butadiene rubber ( SBR , polystyrene-polybutadiene copolymer).
- Nitrile butadiene rubber (copolymer of polybutadiene and acrylonitrile, NBR, perbunan, SKN, BNKS).
- Hydrogenated nitrile butadiene rubber ( HNBR, Hydrated Nitrile Rubbers ) - Therban and Zetpol .
- Chloroprene rubber ( CR, Chloroprene Rubber ), polychloroprene, Neoprene , Baypren, Nairit, etc.
- Polysulfide rubbers .
Saturated rubbers that cannot be cured with sulfur compounds:
- Ethylene-propylene rubber ( EPR, ethylene propylene rubber , copolymer based on polyethylene and polypropylene) and ethylene-propylene-diene rubber ( EPDM, ethylene , terpolymer of polyethylene, polypropylene and diene components).
- Epichlorohydrin rubber ( ECO ).
- Polyacrylic rubber ( ACM, ABR ).
- Silicone rubber - silicone rubber ( SI, Q, VMQ, SKT ).
- Fluorosilicone rubber ( FVMQ, Fluorosilicone Rubber ) .
- Fluoroelastomer ( FKM, FPM, GFR ) - Viton , Tecnoflon , Fluorel and Dai-El.
- Perfluoroelastomers ( FFKM ).
- Tetrafluoroethylene / Propylene Rubber ( FEPM ).
- Chlorosulfate-polyethylene ( CSM , HSPE, Hypalon ).
- Ethylene Vinyl Acetate ( EVA ).
- Thermoplastic polyurethane elastomer ( TPU , Ecopur ).
Other elastomers:
- Thermoplastic elastomers ( TPE ) [1] , such as Hytrel , Santoprene, etc.
- Polyurethane
- Rezilin , elastin .
See also
- Fluoroelastomers
Notes
- ↑ THERMOELASTOPLASTS “Dormomplekt . dormakomplekt.ru. Date of treatment January 14, 2017.