Changes

'''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