Difference between revisions of "Kevlar"
Jump to navigation
Jump to search
| Line 1: | Line 1: | ||
| − | '''Kevlar''' is the registered trade mark of a para-aramid (aromatic polyamide) fiber produced by DuPont. Chemists 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: | + | '''Kevlar''' is the registered trade mark of a para-aramid ([[aromatic polyamide]]) fiber produced by DuPont. [[Chemists]] 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]]) | *high tensile strength at low weight (five times stronger than the same weight of [[steel]]) | ||
| − | *low density | + | *low [[density |
| − | *low electrical conductivity | + | *low [[electrical conductivity]] |
| − | *high chemical resistance | + | *high [[chemical resistance]] |
| − | *low thermal shrinkage | + | *low [[thermal shrinkage]] |
| − | *excellent dimensional stability | + | *excellent [[dimensional stability]] |
| − | *high cut resistance | + | *high [[cut resistance]] |
*flame resistant | *flame resistant | ||
*self-extinguishing | *self-extinguishing | ||
Revision as of 01:30, April 17, 2008
Kevlar is the registered trade mark of a para-aramid (aromatic polyamide) fiber produced by DuPont. 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.