Kevlar molecular structure. Dotted lines indicate the .

Kevlar molecular structure. wikipedia. WHAT IS KEVLAR®? Kevlar® is an organic fiber in the aromatic polyamide family. Mar 1, 2015 · This hierarchical structure enables Kevlar to have more aligned crystalline structure than most structural polymers [1]. Write a condensed (bracketed) repeating structure of the Kevlar molecule. Kevlar production is expensive because of the difficulties arising from using toxic concentrated sulfuric acid, needed to keep the water-insoluble polymer in solution during its synthesis and spinning. Incorporating structural characterizations previously reported in the literature [6,8e10,12,13], we highlight several key Kevlar ® fiber features, including File:Kevlar chemical structure H-bonds. Kevlar's strength is due in part to hydrogen bonding between the polymer chains. In Kevlar the aromatic groups are all linked into the backbone chain through the 1 and 4 Jan 18, 2025 · Kevlar is renowned for its exceptional tensile strength-to-weight ratio, making it an ideal material for a variety of applications ranging from ballistic armor to aerospace components. Best known for its use in ballistic body armor, Kevlar ® also has many other applications because of its high tensile strength-to-weight ratio. from publication: A review on current status and development possibilities of soft armour panel assembly | This review Kevlar ® fiber structural schematic. But why is Kevlar so strong? And how does Kevlar’s melting point enhance its performance? In this article, we will explore the unique properties of Kevlar, focusing on its molecular structure and the high melting point that ensures its robustness even under Jun 30, 2025 · Yes, Kevlar is a polyamide, made up of repeating amide bonds that link aromatic rings into strong, rigid chains. Caring for Kevlar Chemical Structure The chemical name of Kevlar fiber is poly (p-phenylene terephthalate) (PPTA), and its molecular chain is formed by terephthaloyl chloride and p-phenylenediamine through polycondensation. Jan 24, 2019 · The chemical structure of Kevlar® is presented in Fig. May 20, 2024 · The chemical formula of the Kevlar polymer is C14H10N2O2; 14 Carbons, 10 Hydrogens, 2 Nitrogens and 2 Oxygens. This arrangement allows for hydrogen bonding between the polymer chains, resulting in a highly organized and densely packed structure. A Kevlar - Structure and Properties Structure and Properties When Kevlar is spun, the resulting fiber has a tensile strength of about 3,620 MPa, and a relative density of 1. org Protesi Usage on fa Oct 19, 2023 · Kevlar Structure: What Is Kevlar Made Of? Kevlar is a polymer, which means that it has units that are repeating and bound together to form a much bigger molecule. A monomer unit of Kevlar is an aromatic amide, or aramid. It starts out as a thin string of molecules, which extend and form straight parallel chains; therefore, the chains create strong hydrogen bonds between the molecular lines which gives kevlar its strength. Introduction Kevlar is a manmade fibre, it as an organic fibre in aromatic polyamide family. I’ve diverged from usual chemical structure representations, which would have the amide bonds arranged in a zig-zag, as in this case a rigid rod more accurately represents its structure. Kevlar‘s Molecular Structure: The Key to Its Strength At the heart of Kevlar‘s exceptional strength lies its unique molecular structure. Jan 6, 2012 · 1. While on the research and development team, Dr. Jun 21, 2025 · Chemical Structure of Kevlar Kevlar’s chemical structure is what gives it incredible strength and durability. from publication: Comparative Study of Shape Memory Alloy Reinforced Kevlar Polymer Composite in Sheet and Wire Form with Plain Kevlar Structure et propriétés Représentation schématique du PPD-T. The diagram shows the polymer structure of Kevlar, with hydrogen bonds between polymer chains represented by dotted lines. These monomers have 14 carbon atoms, 2 nitrogen atoms, 2 oxygen atoms, and 10 hydrogen atoms. Kevlar® and Nomex® are widely-utilized aramid materials, whereas VAR is a technical fabric comprising 64% viscose, 24% para-aramid (Kevlar®), 10% polyamide, and 2% antistatic fibers. Jun 1, 2018 · Molecular dynamics methods [22] are an excellent tool to analyze the structure at molecular, nano- and even sub-micron length scale. This method involves illuminating the surface of a material with an incident laser light and observing the scattering characteristics. If you're interested, the full chemical name of Nomex is poly (m-phenylenediamine isophthalamide), while Kevlar is poly (p-phenylenediamine terephthalamide); Nomex is a meta-aramid (m-aramid) polymer while Kevlar is a para-aramid (p-aramid Thus far, we have used two-dimensional Lewis structures to represent molecules. Kevlar is actually a trade name for the polymer; its chemical name is polyparaphenylene terephthalamide. There are many inter-chain bonds making the material extremely Jan 18, 2025 · Kevlar est réputé pour son rapport de résistance à la traction et de poids exceptionnel, ce qui en fait un matériau idéal pour une variété d'applications allant de l'armure balistique aux composants aérospatiaux. You’ll find it in protective gear like body armor and helmets because it withstands cuts, heat, and abrasion without adding bulk. You’re dealing with aramid fibers, which are long chains of aromatic polyamides. [1] As a material, Kevlar was first commercially used in the early 1970s; it is spun into ropes or fabric sheets that can be used as such or as an ingredient in Jun 17, 2025 · You rely on ballistic Kevlar fabric because its tightly woven polyamide fibers create a molecular structure that resists stretching and breaking under impact. 3 days ago · Kevlar’s exceptional toughness can be attributed to the unique arrangement of its molecular structure, which is reinforced by intermolecular forces including hydrogen bonding and Van der Waals interactions. Its crystalline molecular structure, reinforced by hydrogen bonds, gives it outstanding and unique mechanical and thermal properties. You’ll find that Kevlar is a synthetic polymer made up of long chains of repeating units called aromatic polyamides or aramids. Jun 22, 2014 · The monomers used to form Kevlar are 1,4-phenylene-diamine and terephthaloyl chloride. Oct 4, 2016 · Kevlar is made by a condensation reaction of an amine (para-phenylene diamine) and acid chloride (terephthaloyl chloride, PPD-T chloride). but for a different reason. The production of aramid fibers known under their trademark names Kevlar® and Nomex. These molecules possess a distinctive arrangement of amide groups (-CO-NH-) linked by aromatic rings in their molecular structure. ® have unique and beneficial properties. org Kevlar Usage on eu. But what exactly is this wonder material made of, and how does its composition contribute to its extraordinary properties? As we delve into the science behind Kevlar, we'll uncover the fascinating world of molecular engineering that has revolutionized industries ranging from personal protection to aerospace technology. The very low compressive strength and its ability to absorb moisture, together with difficulties in cutting are Jan 1, 2006 · Fibers of Kevlar consist of long molecular chains produced from poly-paraphenylene terephthalamide. When an incident photon from Created by Stephanie Kwolek, DuPont ™ Kevlar ® is a heat-resistant para-aramid synthetic fiber with a molecular structure of many inter-chain bonds that make Kevlar ® incredibly strong. Developed in the 1960s, Kevlar’s unique molecular structure gives it strength five times that of steel by weight Jun 23, 2025 · The molecular structure’s tight, parallel chains enhance energy absorption and impact resistance, critical for ballistic applications. This orderly, untangled arrangement of molecules is described as a crystalline structure. These features make Kevlar tougher and more durable than many other polyamides. Kevlar, a polyamide used to make bulletproof vests, is made from terephthalic acid and paraphenylenediamine. In Kevlar, the para-substitution of the monomers allows the benzene rings to lie centrally along the molecular axis as shown in Figure 1. Kevlar has many applications, ranging from bicycle tires and racing sails to bulletproof vests, all due to its high tensile strength-to-weight ratio; by this measure it is five times stronger than steel. Jun 17, 2025 · Chemical Structure of Aramid Fibers Although you mightn’t see it, Kevlar’s strength comes from its unique chemical structure. You’ll find its chemical structure gives it remarkable strength and heat resistance through tight molecular packing and extensive hydrogen bonding. This is a common occurrence with other polymers as well, with the Teflon found in saucepans and frying pans going by the chemical name polytetrafluoroethene. This structure gives Kevlar both rigidity and Chemical structure of Nomex and Kevlar fibers can be described by the common formula in Fig. 44. Discover how Kevlar’s unique molecular structure delivers exceptional strength, lightness, and thermal stability, vital for high-performance applications. You start by dissolving the aramid polymer in a solvent, creating a viscous liquid called a dope. Molecular structure of Kevlar: bold represents a monomer unit, dashed lines indicate hydrogen bonds. Kevlar fibers are para aramid fibers rather than meta aramid structure of Nomex. The monomers normally used for the production of the polymer for Kevlar fibers are p-phenylene diamine and terephthaloyl chloride. In this paper, the effects of H-bond interaction on the axial, transverse and shear properties of the Kevlar® crystal are predicted by using all-atom molecular dynamics (MD) simulations. Compare this with hydrogen bonding in a protein α-helix or β-sheet structure. Autre représentation de la structure chimique du PPD-T. Here we report detailed investigations of processing-internal structure-property relationships among four distinct Jun 17, 2025 · Since Kevlar’s strength depends on its molecular structure, its manufacturing process carefully controls how the fabric is formed. A KEVLAR fiber is an array of molecules oriented parallel to each other like a package of uncooked spaghetti. Kevlar can be made into strong, tough, stiff, high-melting fibres, five times stronger per weight than steel; it is used in radial tires, heat- or flame-resistant fabrics, In 1973, DuPont was the first company to introduce a para-aramid fiber, calling it Kevlar; this remains one of the best-known [citation needed] para-aramids and/or aramids. Structure chimique du PPD-T. Aramids are a family of nylons, including Nomex and Kevlar. Location: Concepts Shown: The structure and properties of Kevlar Equipment: Sample of Kevlar fabric from Prof. Kevlar has a unique combination of high strength, high modulus, toughness and thermal stability. These two aramids are similar in basic structure and are sometimes produced in the same production plants. These chains contain repeating units with benzene rings connected by amide linkages. Kevlar belongs to the aramid family of synthetic fibers, which are characterized by their aromatic polyamide structure. The black section highlights the repeat unit that contains two aromatic carbon rings in the polymer. Jun 22, 2018 · The structure of poly-paraphenylene terephthalamide or Kevlar. The difference is in their structure, Kevlar® is a para-aramid while Nomex® is a meta-aramid. The chains are highly oriented with strong interchanged bonding that results in an unusual Jun 12, 2025 · The molecular structure of Kevlar is responsible for its exceptional properties, including its high strength, stiffness, and thermal stability. Kevlar and Nomex are examples of chemicals called synthetic ar omatic poly amid e s or aramids for short. The unique properties anddistinct chemical composition of wholly aromatic polyamides (aramids) distinguish them from other man-made fibre. Calling Kevlar a synthetic aromatic polyamide polymer makes it sound unnecessarily complex. Structure of Kevlar The above diagram gives details how a Kevlar can exhibit high strength. Oct 16, 2017 · Advancements in processing techniques have facilitated the development of a series of unique high-performance DuPont™ Kevlar ® fibers. In the following clip, Dr. 9 angstroms with a 90° unit cell angle [3]. Dec 30, 2023 · Structure and Composition Kevlar's molecular structure and its resilience to wear are key factors that contribute to its toughness as a fabric. An aramid is a polyamide where at least 85% of the amide bonds are Poly (p-phenylene terephthalamide) | C14H14N2O4 | CID 62788 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. It’s also heat and chemical-resistant, so it holds up under tough conditions. Kevlar’s superior strength-to-weight ratio offers protection comparable to steel at a fraction of the weight, enabling mobility and comfort. 44 (0. org Kunststoff Aramide Usage on el. Polymerisation of alkenes to addition polymers - structure, properties, uses of poly (alkene) polymers The manufacture, molecular structure, properties and uses of polyesters Amides chemistry - a mention of polyamides The structure, properties and uses of polyesters and polyamides involving aromatic monomers Oct 17, 2005 · Kevlar¿ fibers are based on poly-paraphenylene terephthalamide, a rigid molecule that makes it easier to realize a fully extended, or straight, chain configuration. Properties of this fiber are: Kevlar is a well-known component of personal armor including combat helmets, ballistic facemasks, and ballistic vests. Dotted lines indicate the Chemistry's Role Kevlar is strong because of both its chemical structure and the way it is made. five times stronger per unit weight than steel), a high modulus of elasticity, a very low coefficient of thermal expansion, and very low pre-fracture elongation as well as excellent corrosion and flame resistance. Widely used in body armor, aerospace, and automotive industries, Kevlar balances durability, flexibility, and Chemical structure of Nomex and Kevlar fibers can be described by the common formula in Fig. org Кевлар Usage on ca. The chemical structure of Kevlar can be represented as: The following other wikis use this file: Usage on ar. Procedure: The instructor should drape the Kevlar fabric over him/herself and tell the students that this weave is the same material used in bullet proof vets. [2] It is also used to make modern marching drumheads that withstand high impact, and for mooring lines and other underwater applications. When Kevlar is spun, the resulting fiber has a tensile strength of about 3,620 MPa (525,000 psi), [23] and a relative density of 1. Download scientific diagram | Molecular structure of Kevlar molecule. Oct 1, 2023 · Kevlar® and Nomex® differ in their chemical structure only in the position of the amide group (para or meta), so we decided to use a para -substituted model compound, as the type of substitution is not expected to significantly affect the type of chemical reactivity studied herein. Kevlar's molecular structure; BOLD: monomer unit; DASHED: hydrogen bonds. Jul 17, 2023 · The surface modification of fabrics composed of Kevlar®, Nomex®, or VAR was extensively investigated. Molecular structure of Kevlar: bold represents a monomer unit, dashed lines indicate hydrogen bonds. . [6] Liquid-crystal polymers are present in melted/liquid or solid form. Molecular structure of Kevlar Molecular structure of the LCP Vectran [5] Liquid crystallinity in polymers may occur either by dissolving a polymer in a solvent (lyotropic liquid-crystal polymers) or by heating a polymer above its glass or melting transition point (thermotropic liquid-crystal polymers). Memeger describes his contribution to the Kevlar project and gives a tour of Kevlar's molecular structure: Sep 6, 2024 · Kevlar’s reputation for strength and durability makes it a staple in applications ranging from bulletproof vests to racing sails. The chemical structure of Kevlar consists of long, rod-like polymer chains that are highly oriented and hydrogen-bonded, creating a rigid and tightly packed fiber. In the molecular structure, benzene rings and amide groups are arranged alternately to form highly regular linear macromolecules. The resultant aromatic polyamide contains aromatic and amide groups which makes them rigid rod like polymers, and is more properly known as a para-aramid. A para-aramid fiber’s molecular structure looks like the image below. A similar fiber, Twaron, with the same chemical structure Apr 17, 2025 · As a data source specialist and technology journalist, I‘m excited to delve deeper into the science behind Kevlar and explore why it is so incredibly strong and versatile. May 17, 2023 · In its chemical structure, it's very similar to another versatile protective material called Nomex. This glue is actually a type of chemical bond known as a hydrogen bond. org P-fenylendiamin Usage on da. The manufacturing process of Kevlar involves the polymerization of p-phenylene diamine and terephthaloyl chloride, followed by the formation of the fiber through a wet spinning process. org Κέβλαρ Usage on et. Jun 17, 2025 · Kevlar fabric is a super-strong, lightweight material designed to protect you while staying flexible. Kevlar is used in bullet-resistant body armor such as this bulletproof vest. The diagram in bolt represents the single monomer unit of Kevlar fiber. More specifically, Kevlar contains both aromatic and amide molecular groups. However, molecular structure is actually three-dimensional, and it is important to be able to describe molecular bonds in terms of their distances, angles, and relative arrangements in space (Figure 11. The microfibrils feature was observed with an average width of 500 nm, composed of various types of periodical units of an average size 50 nm in a pleating appearance. [2] It is also used to make modern marching drumheads that withstand high impact; and for mooring lines and other underwater applications. Nov 28, 2023 · Terminology and Chemical Structure of Aramid Fibers Chemical Structure Aramid fibers consist of long-chain polyamide molecules. This chemical composition is key to understanding Kevlar's exceptional strength These two polymers are distinguished by the structure of their molecules, Nomex being characterized by meta -oriented phenyl rings and Kevlar by para -oriented rings: Nomex melts and simultaneously decomposes at approximately 350 °C (660 °F); the melting point of Kevlar is above 500 °C (930 °F). e. S1, in which the aromatic rings are linked to the backbone chain through the para- positions, and the adjacent chains bond together via Download scientific diagram | Chemical structure of Kevlar from publication: EXPERIMENTAL INVESTIGATION ON MECHANICAL PROPERTIES OF KEVLAR FIBRE | The experimental investigation was carried out on Properties Kevlar is a type of aramid that consists of long polymeric chains with a parallel orientation. Chemical Structure Polymer Backbone: Kevlar's chemical name is poly (p-phenylene terephthalamide). Its “rigid-rod” characteristic is a function of the para Kevlar is a type of fibre called an aramid, short for 'aromatic polyamide', in which the molecules form long, highly-oriented chains. Kevlar Kevlar is similar in structure to nylon-6,6 except that instead of the amide links joining chains of carbon atoms together, they join benzene rings. Kevlar has become a household name, synonymous with strength and protection. Kevlar (a kind of aramid fiber) has a very high tensile strength (i. Both aramid materials and cellulose/viscose exhibit exceptional mechanical properties that render them WHAT IS KEVLAR®? Kevlar® is an organic fiber in the aromatic polyamide family. Kevlar has many applications, ranging from bicycle tires and racing sails to bulletproof vests, due to its high tensile strength-to-weight ratio; by this measure it is five times stronger than steel. In Kevlar the aromatic groups are all linked into the backbone chain through the 1 and 4 Oct 17, 2006 · KEVLAR is a long, chain-like molecule known as a polymer, which consists of repeating units called monomers. This paper focuses on research of structure and certain features of the Kevlar 29 and Kevlar considered certain properties by (Toennies, 1973, 129). Memeger found a commercially viable method of synthesizing polymer chains of sufficient length for Kevlar products. Its amine functional group is situated with the meta orientation on the phenyl ring in a monomer unit, as opposed to the para configuration in Kevlar. Compared to Kevlar®, nylon and polyester have relatively low moduli and intermediate melting points. Chemical properties Fibers of Kevlar consist of long molecular chains produced from PPTA-poly (paraphenylene terephthalamide). org Kevlar Usage on de. 1). When a bullet strikes, Kevlar absorbs and disperses the energy across its strong, flexible layers, preventing penetration and reducing blunt trauma. If you want to understand why this makes Kevlar ideal The Molecular Marvel: Understanding Kevlar's Structure At its core, Kevlar is a high-performance plastic, but to truly appreciate its unique properties, we need to examine its molecular structure. In the case of Kevlar, the repeating units form chains. When this molecule polymerises, the ring opens, and the molecules join up in a continuous chain. Beneath Kevlar’s surface lies a textured weave and unique molecular structure that combine strength and flexibility—discover why this fabric is truly extraordinary. FIBER-LINE®’s ability to add value to the already atractive properties of both Kevlar®Para-Aramid & Nomex® Meta-Aramid creates more opportunity in the market place to provide solution driven products to a diverse range of markets. Nomex, on the other hand, is a constitutional isomer of Kevlar. This synthetic polymer has exceptional tensile strength, up to 10 times stronger than steel at the same weight. 18 angstroms and c = 12. The fibres can be spun or woven into mats or fabrics to exploit these exceptional properties. The unique properties and distinct chemical composition of wholly aromatic polyamides (aramids) distinguish them—and especially Kevlar®—from other commercial, man-made fibers. 052 lb/in 3). secondary, and tertiary chemical structure. Media in category "Structural illustrations and formulas of Kevlar" The following 24 files are in this category, out of 24 total. Chemical structure of Nomex and Kevlar fibers can be described by the common formula in Fig. org Kevlar Usage on cs. Kevlar derives its strength from intra-molecular hydrogen bonds and phenyl stacking interactions between aromatic groups in neighboring strands. Laine and the straw models to demonstrate Kevlar fibrillation and kinking. Poly-para phenylene terephthalate (K29), which is branded as Kevlar, is a structure of tightly knit and squeezed aramid fibers, it is a heat-resistant and strong synthetic material, which contains monomers that build-up to create the fiber. A bond angle is the angle between any two bonds that include a common atom, usually measured in degrees. Jan 13, 2025 · The specific chemical structure of Kevlar includes alternating amide groups and para-phenylene terephthalamide units. May 29, 2024 · Learn about Kevlar’s properties such as high tensile strength, thermal stability, and impact resistance, making it essential in various industries. [7] In solid form Download scientific diagram | Chemical structure of Kevlar. Mar 10, 2025 · Discovering Kevlar Kevlar is a highly resistant synthetic aromatic polyamide. The sheets of molecules are themselves held together by strong intermolecular forces and the 'molecular sheets' can be aligned to maximise theses forces and the combined strength of many such sheets gives Kevlar fibres their great strength. These inter-molecular hydrogen bonds form between the carbonyl groups and N H centers. Directly characterizing interior structures of these fibers is vital for connecting processing variations with resulting mechanical properties. Its unique molecular structure and tight fiber alignment give it incredible strength—five times stronger than steel by weight—making it perfect for bulletproof vests, helmets, and protective gear. org كيفلار Usage on bg. Kevlar fabric is a high-strength, lightweight material made from synthetic aramid fibers known for its exceptional durability and impact resistance. 1 a 2. Understanding the composition of Kevlar is essential in appreciating its remarkable strength and durability. He/she should then explain how the fabric behaves Dec 13, 2006 · They were developed as high modulus, high-strength fibers whose properties can be varied depending on the spinning and drawing conditions and are presently available as Kevlar and Kevlar-29, both formerly Fiber B, and Kevlar-49, formerly PRD-49, as continuous-filament fiber or fabric. Background Raman spectroscopy can be used to study the chemical composition and structure of polymer materials such as Kevlar. In 1978, Akzo introduced a similar fiber with roughly the same chemical structure calling it Twaron. Kevlar is the DuPont Company 's registered trademark for a very light, very strong synthetic fiber created in 1965 by Stephanie Kwolek and Herbert Blades. 1. Kevlar is a highly crystalline polymer with a rigid, rod-like molecular structure, which contributes to its exceptional strength and heat resistance. The molecular formula is which makes up the molecules is [-CO Feb 27, 2018 · Here, we propose a new two-dimensional (2D) polymer, “graphamid”, that closely resembles Kevlar in chemical structure, but is mechanically advantaged by virtue of its 2D structure. The primary, or molecular structure, of the Kevlar extended chain can be classified as monoclinic with the following lattice parameters: a = 7. Hydrogen bonds form when regions of adjacent molecules with opposite charges attract each other (see Kevlar comes from the distinguished polyamide family in which they are derived from benzene, resulting in a fiber with extremely long molecular chains, giving it an almost ridge-like structure. Structure chimique Backbone polymère: Le nom chimique de Kevlar est le poly (p-phénylène téréphtalamide). A similar fiber called Twaron with roughly the same chemical structure was developed by Akzo in the 1970s, commercial production started in 1986, and Twaron is now manufactured by Teijin. The Remarkable Properties of Kevlar: Durability, Strength, and Heat Resistance Kevlar, a synthetic fiber known for its incredible strength and durability, is a crucial material in a variety of applications ranging from bulletproof vests to racing Created by Stephanie Kwolek, DuPont ™ Kevlar ® is a heat-resistant para-aramid synthetic fiber with a molecular structure of many inter-chain bonds that make Kevlar ® incredibly strong. At the less crystalline spot on the Kevlar® fiber surface, the periodical Created by Stephanie Kwolek, DuPont ™ Kevlar ® is a heat-resistant para-aramid synthetic fiber with a molecular structure of many inter-chain bonds that make Kevlar ® incredibly strong. 87 angstroms, b = 5. Dec 1, 1999 · Kevlar® fiber surface structure was primarily and directly observed in the filament configuration by the tapping mode atomic force microscopy (AFM). Apr 19, 2025 · Kevlar ® (another DuPont textile) is also an aramid, but with a slightly different chemical structure. Dec 1, 2020 · A multiscale model has been developed based on the well-characterized hierarchical structure of Kevlar fiber, which can be divided into three levels: molecular structure (nanoscale), microfibril structure (microscale) and single fiber level (macroscale). In Kevlar the aromatic groups are Technical Guide for Kevlar® Aramid Fiber 6 SECTION II: PROPERTIES OF DUPONT™ KEVLAR® Table II-2 compares the properties of Kevlar® 29 and Kevlar® 49 to other yarns, such as glass, steel wire, nylon, polyester, polyethylene and carbon. The polymer owes its high strength to the many inter-chain bonds. Jul 4, 2025 · Kevlar, trademarked name of poly-para-phenylene terephthalamide, a nylonlike polymer first produced by Du Pont in 1971. svg From Wikimedia Commons, the free media repository File File history File usage on Commons File usage on other wikis Metadata We then quantitatively correlate our results to the structural tensile data of Kevlar from previous studies utilizing wide-angle X-ray diffraction (WAXD) [5] and Raman spectroscopy [6], to provide insight into the molecular mechanisms by which Kevlar tolerates stress. Le Kevlar est une fibre synthétique qui possède de très bonnes propriétés mécaniques en traction (résistance à la rupture de 3 100 MPa et module entre 70 et 125 GPa) et fatigue. In the first part of paper, the author will consider the basic information about Kevlar 29 and Kevlar 49 for a better understanding of the research subject. Nov 13, 2015 · Sometimes referred to as a Space Age material, it is the chemical structure and processing of Kevlar that makes it so strong. The two monomers are benzene-1,4-dicarboxylic acid and 1,4-diaminobenzene. It provides a kind of molecular “glue” to hold adjacent polymer chains together. umvkszes gwasb vgnx kpipxag gark sqt ukd towji zbqoaoq srq