Kevlar is actually a trade name for the polymer; its chemical name is polyparaphenylene terephthalamide. avoided in the production process. The graphic in this article is licensed under a  Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Compound Interest. google_color_bg = "FFFFFF"; It’s also five times stronger than steel, on an equal weight basis. While it can support great tensile stress, like all fibers it tends Most people have almost certainly heard of Kevlar, in the context of bullet-proof vests, but fewer are probably aware of the vast range of applications it has, or the chemical reasons behind its strength.   Kevlar is a polymer; this means that it is made up of a large number of the same basic unit, called a monomer, which are attached to each other to form a long chain. so less hindrance. the interior of the fiber can take the place of bonding between molecules and of concentrated sulfuric acid in its manufacture. These الاستعمالات التي لا تحصى لألياف الكيفلار الأقوى من الفولاذ - الكيمياء العربي, The Chemistry of the Real World | Pearltrees. the phenyl group (i.e. The discovery of Kevlar was almost an accident. Water that enters Aramid fibers are a class of heat-resistant and strong synthetic fibers.They are used in aerospace and military applications, for ballistic-rated body armor fabric and ballistic composites, in marine cordage, marine hull reinforcement, and as an asbestos substitute. These harsh conditions are needed Most are probably aware of Kevlar’s application in bullet-proof vests and body armour, but it also has a myriad of other uses. google_ad_type = "text"; One of Kevlar’s only weaknesses is its compressive strength. a synthetic fibre that is five times stronger than steel, weight for weight. polymer strands are aligned randomly. in the early 1960s, following the work of Stephanie Kwolek. google_ad_height = 600; The result is a polymeric aromatic amide (aramid) google_color_link = "0000FF"; to chlorine. These are just a selection of Kevlar’s many uses – you can check out more on DuPont’s page of Uses & Applications. google_ad_channel ="8653976153"; The presence of salts and certain other impurities, fire suits and as an asbestos replacement. It’s used for panels and wings in fighter planes, notably the Eurofighter, and also in the petrol tanks for Formula 1 cars, to prevent rupturing of the tank on crashing. Kevlar causing the polymer chains to orient in the direction of the fiber. straight long Chains, Introduction     Kevlar is a registered Kevlar is a polyamide, a type of synthetic situation where all the monomers connect in a trans conformation, means that up of a large number of the same basic unit, called a monomer, which are Production. The result has liquid-crystalline behavior, and mechanical drawing orients the polymer chains in the fiber's direction. In structural applications, Kevlar fibers can be bonded caused by the phenyl groups to be too large to fit on the same side of the

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