Difference between revisions of "Kevlar"
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| − | + | '''Kevlar''' is the registered trade mark of a para-aramid ([[aromatic polyamide]]) fiber produced by [[DuPont]] Chemical Company. [[Chemist]]s Stephanie Kwolek and Herbert Blades first synthesized Kevlar in 1965, and Kwolek [[patent]]ed the fiber in 1966. Fibers of Kevlar consist of long [[molecule|molecular]] chains produced from '''poly-paraphenylene terephthalamide'''. The chains are highly oriented with strong interchain bonding, which results in a unique combination of properties, including: | |
| + | *high tensile strength at low weight (five times stronger than the same weight of [[steel]]) | ||
| + | *low [[density]] | ||
| + | *low [[electrical]] conductivity | ||
| + | *high [[chemical]] resistance | ||
| + | *low thermal shrinkage | ||
| + | *excellent [[dimensional stability]] | ||
| + | *high [[cut resistance]] | ||
| + | *flame resistant | ||
| + | *self-extinguishing | ||
| + | |||
| + | Kevlar does not rust nor [[corrosion|corrode]] and is used in bullet proof vests, underwater cables, brake linings, space vehicles, boats, parachutes, skis, and building materials. | ||
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| + | ==References== | ||
| + | |||
| + | *http://www2.dupont.com/Kevlar/en_US/ | ||
| + | |||
| + | [[Category:Technology]] | ||
Latest revision as of 00:40, December 7, 2018
Kevlar is the registered trade mark of a para-aramid (aromatic polyamide) fiber produced by DuPont Chemical Company. Chemists Stephanie Kwolek and Herbert Blades first synthesized Kevlar in 1965, and Kwolek patented the fiber in 1966. Fibers of Kevlar consist of long molecular chains produced from poly-paraphenylene terephthalamide. The chains are highly oriented with strong interchain bonding, which results in a unique combination of properties, including:
- high tensile strength at low weight (five times stronger than the same weight of steel)
- low density
- low electrical conductivity
- high chemical resistance
- low thermal shrinkage
- excellent dimensional stability
- high cut resistance
- flame resistant
- self-extinguishing
Kevlar does not rust nor corrode and is used in bullet proof vests, underwater cables, brake linings, space vehicles, boats, parachutes, skis, and building materials.