Elastomer

elasticelastomerselastomericelasticizedrubberElasteelastic componentelastic materialelastic materialselasticated
An elastomer is a polymer with viscoelasticity (i.e., both viscosity and elasticity) and has very weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials.wikipedia
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Synthetic rubber

rubberartificial rubbersynthetic
The term, a portmanteau of elastic polymer, is often used interchangeably with rubber, although the latter is preferred when referring to vulcanisates.
A synthetic rubber is any artificial elastomer.

Elasticity (physics)

elasticityelasticelasticity theory
An elastomer is a polymer with viscoelasticity (i.e., both viscosity and elasticity) and has very weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials.
For rubber-like materials such as elastomers, the slope of the stress–strain curve increases with stress, meaning that rubbers progressively become more difficult to stretch, while for most metals, the gradient decreases at very high stresses, meaning that they progressively become easier to stretch.

Glass transition

glass transition temperaturevitrifiedvitrification
Elastomers are amorphous polymers maintained above their glass transition temperature, so that considerable molecular reconformation, without breaking of covalent bonds, is feasible.
Their T g values are well above room temperature, both at around 100 C. Rubber elastomers like polyisoprene and polyisobutylene are used above their T g, that is, in the rubbery state, where they are soft and flexible.

Deformation (mechanics)

straindeformationshear strain
An elastomer is a polymer with viscoelasticity (i.e., both viscosity and elasticity) and has very weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials.
On the other hand, for some materials, e.g. elastomers and polymers, subjected to large deformations, the engineering definition of strain is not applicable, e.g. typical engineering strains greater than 1%, thus other more complex definitions of strain are required, such as stretch, logarithmic strain, Green strain, and Almansi strain.

Polymer

polymershomopolymerpolymeric
An elastomer is a polymer with viscoelasticity (i.e., both viscosity and elasticity) and has very weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials.
While branched and unbranched polymers are usually thermoplastics, many elastomers have a wide-meshed cross-linking between the "main chains".

Silicon

Sisilicon revolutionsilicium
Each of the monomers which link to form the polymer is usually a compound of several elements among carbon, hydrogen, oxygen and silicon.
The middle of the 20th century saw the development of the chemistry and industrial use of siloxanes and the growing use of silicone polymers, elastomers, and resins.

Vulcanization

vulcanizedvulcanized rubbervulcanisation
The term, a portmanteau of elastic polymer, is often used interchangeably with rubber, although the latter is preferred when referring to vulcanisates. Elastomers are usually thermosets (requiring vulcanization) but may also be thermoplastic (see thermoplastic elastomer).
Vulcanization can therefore be defined as the curing of elastomers; with the terms 'vulcanization' and 'curing' sometimes used interchangeably in this context.

Natural rubber

rubberIndia rubbercaoutchouc
Natural rubber, neoprene rubber, buna-s and buna-n are all examples of such elastomers.
Forms of polyisoprene that are used as natural rubbers are classified as elastomers.

Thermoplastic elastomer

TPEthermoplastic elastomersThermoplastic rubber
Elastomers are usually thermosets (requiring vulcanization) but may also be thermoplastic (see thermoplastic elastomer).
Thermoplastic elastomers (TPE), sometimes referred to as thermoplastic rubbers, are a class of copolymers or a physical mix of polymers (usually a plastic and a rubber) that consist of materials with both thermoplastic and elastomeric properties.

Thermosetting polymer

thermosetthermosetting plasticthermosetting
Elastomers are usually thermosets (requiring vulcanization) but may also be thermoplastic (see thermoplastic elastomer).
Curing a thermosetting resin transforms it into a plastic, or elastomer (rubber) by crosslinking or chain extension through the formation of covalent bonds between individual chains of the polymer.

Cross-link

crosslinkingcross-linkedcrosslink
The long polymer chains cross-link during curing, i.e., vulcanizing.
Intermediate cross-link densities transform gummy polymers into materials that have elastomeric properties and potentially high strengths.

Gutta-percha

gutta perchaguttagutta-percha latex
It is a polymer of isoprene which forms a rubber-like elastomer.

Polybutadiene

Buna rubberbutadiene rubberpolybutadiene synthetic rubber
It has been found that a substantial percentage of cis double bond configurations in the polymer will result in a material with flexible elastomer (rubber-like) qualities.

Butyl rubber

butylhalobutyl rubberpolyisobutylene
A synthetic rubber, or elastomer, butyl rubber is impermeable to air and used in many applications requiring an airtight rubber.

Ethylene propylene rubber

ethylene-propylene rubber
Ethylene propylene rubber (EPR, sometimes called EPM referring to an ASTM standard) is a type of synthetic elastomer that is closely related to EPDM rubber.

EPDM rubber

EPDMEthylene propylene diene monomerethylene propylene diene monomer (EPDM)
EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers having a saturated chain of the polyethylene type (the M deriving from the more correct term polymethylene).

Silicone rubber

silicone elastomersLiquid Silicone Rubbersilicone elastomer
Silicone rubber is an elastomer (rubber-like material) composed of silicone—itself a polymer—containing silicon together with carbon, hydrogen, and oxygen.

Adhesive

glueadhesivescontact cement
Their primary uses are for seals, adhesives and molded flexible parts.
Synthetic adhesives are based on elastomers, thermoplastics, emulsions, and thermosets.

Plastic

plasticsadditivesadditive
Examples of such qualities and classes are: thermoplastics and thermosets, conductive polymers, biodegradable plastics and engineering plastics and other plastics with particular structures, such as elastomers.

Viton

Viton-based
Viton is a brand of FKM, a synthetic rubber and fluoropolymer elastomer commonly used in O-rings, chemical-resistant gloves, and other molded or extruded goods.

Resilin

Resilin is an elastomeric protein found in many insects and other arthropods. It provides soft rubber-elasticity to mechanically active organs and tissue; for example, it enables insects of many species to jump or pivot their wings efficiently.

Ethylene-vinyl acetate

EVAethylene vinyl acetateEVA foam
EVA is an elastomeric polymer that produces materials which are "rubber-like" in softness and flexibility.

Styrene-butadiene

styrene-butadiene rubberSBRBuna-S
The elastomer is used widely in pneumatic tires.

Epichlorohydrin

epichlorhydrin
Epichlorohydrin is a highly reactive electrophilic compound and is used in the production of glycerol, plastics, epoxy glues and resins, epoxy diluents and elastomers.

Polysulfide

polysulfidesammonium polysulfidepolysulfide group
Many commercial elastomers contain polysulfides as crosslinks.