Kevlar Aramid Fiber :: essays research papers

STRUCTUREKevlar Aramid Fiber is a synthetic substance (man-made) material cognize as a Polymer. A polymer is a ambit that is made up of many similar molecular groups, better cognise as monomers that are bonded unitedly. Monomers are made up of fourteen cytosine atoms, two Nitrogen atoms, two Oxygen atoms and ten Hydrogen atoms. A single Kevlar polymer chain could possibly know anywhere from one to 5-spot million monomers bonded together.A group of polymer irons can be nonionized together in a fibre. How the polymer chains are put together is important, as it improves the properties of the material. The flexibility, fortissimo and stiffness of Kevlar fiber, is dependent on the orientation of the polymer chains. Kevlar fiber is an arrangement of molecules, orientated parallel to each other. This orderly, untangled arrangement of molecules is describe as a Crystalline Structure. A manufacturing do work known as Spinning is needed to achieve this Crystallinity structure. S pinning is a process that involves forcing the liquefied polymer solution through a die (small holes). The Crystallinity of Kevlar Polymer strands, contributes to the unique strength and stiffness of the material. Kevlar is very similar to other common synthetic polymers, including Nylon, polytetrafluoroethylene and Lycra. In all Polated to strength. Aromatic refers to the Carbon atoms attached in a ring, and Amides refers to a group of Carbon, Nitrogen and Hydrogen atoms. Kevlar fiber is therefore a Polyaromatic amide, as it has a extravagantly breaking strength.Polymer chains are long, somebody chains, although they behave as if they are attached to each other. The individual chains are actually held together by Electrostatic Forces between molecules, as well known as Hydrogen Bonds. Scientists discovered this, by using a special type of X-ray microscopy called XANES. This was able to reveal the orientation of molecules in materials. It has also been discovered that the componen ts of Kevlar fiber, have a radial orientation that is in a crystal. The crystal-like regularity is the largest contributing factor in the strength of Kevlar fiber. PROPERTIESIt is five times stronger, yet the same weight as steel. Kevlar Aramid fiber is an better material, which is an extremely lightweight, man-made organic fiber. Kevlar fiber has a combination of properties, which have made Kevlar a very useful material. These include, high strength, low weight, high chemical resistance and high cut resistance. This material does not corrode or rust and is also unaffected when placed in or under water.