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]]