The synthesis of these polymers is done through the nucleophilic acyl substition between a diamine and diacid, both substituted with a phenyl group. Kevlar fiber is based on poly (P-phenylene terephthalamide). Kevlar fiber is used to make a variety of clothing, accessories, and equipment safe and cut resistant.
The best known manufactured polyamides are often called nylons (the trade name given by the manufacturer, DuPont) and these are aliphatic polyamides. This process involves the extrusion of molten polymer solution through small holes (Algahtani, A, 2006). Kevlar Fiber: Kevlar is the trade name of Dupont's para-aramide fibre.

formation and the hydrogen bonding that cements them together, makes Kevlar poly-mer chains line up in a perfect array. Normal bundle size ranges from 134 to 10,000 filaments per bundle. Kevlar fibre is an array of molecules orientated parallel to each other. The orderly, untangled arrangement of molecules is described as the crystalline structure. It is used in bulletproof vests, in composites for boat construction, in lightweight mountaineering ropes, and for lightweight skis and racquets - amongst many other things. Kevlar: Kevlar is a very strong material - about five times as strong as steel, weight for weight. The diameter of the filaments is about 10 µm. Kevlar belongs to the group of polyamides; other compounds that belong in this group are the natural proteins (think of silk with its similar strength/weight properties), and the synthetic Nylon. Kevlar K49 – It has a high modulus used in rope and cable products.

All polyamides are made by the formation of an amide function to link two molecules of monomer together. Due to its organic nature, the maximum temperature used for aramid is limited to about 350°F. In fact, although Kevlar is woven into fibers, it’s much less like thread than it is like steel or ice—a hard crystal in which the molecules interlock in a neat, flawless package. Recently, they have been proposed to be biocidal materials when reacted with household bleach (sodium hypochlorite solution) because they contain amide moieties which can be chlorinated to generate biocidal N -halamine functional groups. K100 – The colored version of Kevlar; Kevlar K119 – It has higher-elongation, and more fatigue resistant

Kevlar is a heat-resistant and strong synthetic fiber, related to other aramids such as Nomex and Technora.Developed by Stephanie Kwolek at DuPont in 1965, this high-strength material was used first commercially in the early 1970s as a replacement for steel in racing tires. Kevlar Aramid fiber was commercialized by DuPont in 1972. Proteins are examples of naturally occurring polyamides. Polyamides are polymers which contain repeating amide, -CO-NH-, linkages.

The crystallinity is obtained by the spinning manufacturing process. Kevlar XP – lighter weight resin and KM2 plus fiber combination Kevlar KM2 – enhanced ballistic resistance for armor applications [15] The ultraviolet component of sunlight degrades and decomposes Kevlar, a problem known as UV degradation , and so it is … Kevlar, the “Not-so-Secretive” Bullet Proof Fiber Figure 1: Left, golden yellow Kevlar aramid fiber. There’s only one problem with some-thing so tough—making it in the first place. Kevlar fiber is used to make a variety of clothing, accessories, and equipment safe and cut resistant. Kevlar is a very strong material - about five times as strong as steel, weight for weight. Kevlar 29 has high toughness; Kevlar 49 has a higher modulus; and Kevlar 149 has ultrahigh modulus. Kevlar K-29 – It is a high toughness grade used in industrial applications, such as cables, body/vehicle armor, brake linings.

Kevlar and Nomex are high-performance polymers which have wide varieties of applications in daily life. Balance the half equation for the formation of aluminium during electrolysis: Al 3+ + e-→ Al. (The acyl group is Cl-C=O) The nucleophile is the nitrogen from the diamine, which then seeks out an electron poor site, the carbon from the diacid.

It looks like a pack of uncooked spaghetti. Kevlar fiber is based on poly (P-phenylene terephthalamide).

It is used in bulletproof vests, in composites for boat construction, in lightweight mountaineering ropes, and for lightweight skis and racquets - amongst many other things. Kevlar and Nomex from DuPont, Teijinconex, Twaron and Technora from Teijin, Kermel from Kermel. Another descriptive name for Kevlar is "para-aramid", where para-refers to the linear linking of the two benzene groups in the structure. Kevlar Fiber: Kevlar is the trade name of Dupont's para-aramide fibre. Kevlar and Nomex are two examples of aromatic polyamides. Stephanie Louise Kwolek (July 31, 1923 – June 18, 2014) was an American chemist who is known for inventing Kevlar.She was of Polish heritage and her career at the DuPont company spanned more than 40 years. Kevlar Aramid fiber was commercialized by DuPont in 1972.