Vectran chemical structure pdf.

• Vectran chemical structure pdf In order to increase this property, Vectran is covered with a layer of polyurethane [13]. These properties make Vectran Elastic Modulus of Aromatic Polymer Crystals Figure I. of Vectran. The tensile strength and elastic modulus of Vectran is similar to other high performance polymers: p-aramid, ultra-high molecular weight polyethylene, and poly(p-phenylene benzobisoxazole). Vectran™ is used in a wide range of applications. Fig. Fiber Chemistry/Molecular Structure Page 19 ^Vectran molecular structure". Thus, residual strain can be seen as early as 0. However, they have some sharp meridional reflections correspond­ Jan 15, 2021 · It is characterized by excellent chemical resistance, retaining durability even at elevated temperatures [12]. [1] Molecular Structure Chemical Name Liquid Crystal Polymer (LCP). Atomic Structure & Chemical Bonding - Harvard University Aug 16, 2016 · Vectran is a polyester (polyacrylate) fibre made from polymer with a high degree of crystallinity. 3. 使用烘箱法对试验原料进行热老化处理，将三 Ultra-high molecular weight polyethylene (UHMWPE) fiber is a high-strength, high-modulus material based on simple and flexible polyethylene molecules. Vectran's highly oriented fiber structure gives it excellent mechanical properties. Manufacturer Kuraray™. Vectran® sleeving is used in a wide range of applications, including aerospace, high tech research, and industrial protection. 表1 试验原料规格 . Vectran is thinner than human hair but five times stronger than steel and 10 times stronger than aluminum. structures. It has a unique combination of properties including high strength, creep resistance, abrasion resistance, chemical resistance, and retention of properties at high and low temperatures. the stiffness of molecule. Hearle; Brenda Lomas; William D. Its specific strength (strength/weight) is much higher than that of traditional metals with lighter materials to achieve higher strength, with obvious Oct 15, 2018 · However, in the case of Vectran, necking (shown experimentally in Fig. Composition Vectran® is an aromatic polyester spun from a liquid crystal Molecular Structure Figure 2: LCP Molecular Structure Vectran®, a liquid crystal polymer (LCP) fiber, offers a balance of properties unmatched by other high performance fibers. ベクトラン（英: Vectran ）は、液晶ポリマー（liquid-crystal polymer ; LCP）からつくられた合成繊維で、セラニーズ・コーポレーション 、現在のクラレによってつくられた。 Table 4. 5% strain upon unloading from a tensile test. The high-performance fiber has a unique chemical structure that gives it an outstanding combination of properties. PubChem is the world's largest collection of freely accessible chemical information. En allant des polyesters aliphatiques vers les polyesters aromatiques, la température de transition vitreuse, la température de fusion, la stabilité thermique, la stabilité chimique s'améliorent. Vectran ® fiber contains ester function groups, which are prone to undergo a photo-chemical reaction causing a chain scission process and thus will have an impact on its mechanical properties. The resin is anisotropic before it is spun through tiny holes producing a highly oriented fiber structure with excellent tensile properties. Although many materials have been used to prepare composite bers, mechanical characterization of soft composites reinforced by LCP short bers has received little attention. This process is a novel, low-energy way to highly orient polymer molecules and to achieve very strong fibers. 2 Hydrogen permeability 37 Table 4. Gras G. S. 1. While its strength under a 20°C atmosphere is about 24cN/dtex, Vectran significantly demonstrates its performance as the temperature is lowered, having strength of about 29cN/dtex in a –70°C atmosphere. The molecular structure is a wholly aromatic polyester. Vectran’s® molecular structure not only makes it one of the world’s strongest materials but Vectran® is also invisible in MRI systems. ture of 625°F. The morphology of the Vectran fiber surface is damaged after accelerated aging. Vectran™ fiber is thermotropic, it is melt-spun, and it melts at a high temperature. FIBER-LINE® Enhancing Processes for Vectran®: Coating; Twisting; Braiding; Extrusion; Pultrusion; Precision Winding; FIBER-LINE® Vectran® Products Jun 20, 2021 · PDF | Vectran is a polyester (polyacrylate) fibre made from polymer with a high degree of crystallinity. 468, ISBN 978-1-85573-319-0 Vectran is a high-performance fiber made from liquid crystal polymer that exhibits exceptional strength, being 5 times stronger than steel and 10 times stronger than aluminum. The unique combination of characteristics of Vectran™ fibers makes it superior to many other May 1, 2019 · Request PDF | Antibacterial nanostructured composite coating on high performance Vectran™ fabric for aerospace structures | Excellent mechanical, thermal and chemical properties make Vectran . Vectran is a manufactured fiber, spun from a liquid-crystal polymer (LCP) created by Celanese Corporation and now manufactured by Kuraray. Vectran™ fiber is available in a variety of sizing options. This fiber is chemically identical to normal polyethylene (PE) fiber with some differences in chemical structure. 2 实验及测试 . If a liquid crystal polymer melt is subjected to shear or stretching flow, as is the case in all thermoplastic processing operations, then the rigid macromolecules order themselves into fibers and fibrils which are frozen-in when the melt cools. The X-ray analysis of Blackwell made it clear that the polymer used is a random copolymer. • Markers show a pipeline’s approximate location; not its exact location. If a liquid crystal polymer melt is subjected to shear or stretching flow, as is the case in all thermoplastic processing operations,then the rigid macromolecules order themselves into fibers and fibrils which are frozen-in when the melt cools. ACCELERATED UV AGING STUDY OF THE VECTRAN FIBER 3287 Journal of Applied Polymer Science DOI 10. Download citation. In addition, because its decomposition temperature is above 400°C, Vectran possesses high heat resistance and most promising was Vectran. Vectran ® is different from other high-performance fibers such as aramid and ultrahigh molecular weight polyethylene (UHMW-PE). Kevlar 100 440 . LCP polymer molecules are stiff, rod-like structures 1 vectran [FINAL]-QXD 10/26/99 10:13 AM Page 2. [6] of Vectran. The formula for the Vectran™ molecule is shown here. LCP polymer molecules are stiff, rod-like structures The excellent heat resistance of Vectran® is summarized below and in Table 10. Large, tubular structures can be constructed in space using inflatable booms that get their rigidity from internal pressure. 025” 500’ 100’ Natural 0. electrospun is Vectran™, which is an aromatic co-polyester of alternating 4-hydroxybenzoic acid and 2-hydroxy-6-naphtonic acid. Copy link Link copied. Looking at its chemical structure, it is an aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid. VECTRAN® FIBER (VEN) is a high-performance multifilament yarn spun from liquid crystal polymer. クラレ・vectran - technical data. 2 229 Molecular Structure Chemical Name Liquid Crystal Polymer (LCP). 1 chemical structure of Vectran fiber . VECTRAN™ is Kuraray’s high-performance multifilament yarn spun from liquid crystal polymer. The tensile test results reveal that the tensile strength decreases quickly when the fibers are exposed to Xenon lamp irradiation. cablemarkers. It is a secondgeneration super fibre that followed Kevlar® and Twaron®, which are referred to Figure 1 Chemical structure of Vectran fiber. Composition Vectran® is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. ^ J. Off Tomorrow omorr rro ow ENGINEERING DATA. 4 1. The tensile strength of Vectran fiber is conservatively listed as 23 grams per denier for 1500 denier yarn. com. 1002/app. Sep 1, 2013 · The molecular structure nature of Vectran ® might play a role in its photoaging behavior. 2 Vectran is being considered as a possible The morphologies, mechanical properties, chemical structures and behaviors against UV irradiation have been studied. Aug 23, 2015 · 图1 Vectran 纤维的化学结构 . Vectran fiber has both HBA/HNA (73/27, HBA=4-hydroxybenzoic acid, HNA=2-hydroxy-6 Inflatable space structures have been more commonly used for non-habitable structures. 14 (a) and (b)) is suggested to occur due to the accelerated elongation on the fibre surface, which is an inherent characteristic of the skin-core structure of the fibre – Fig. Search chemicals by name, molecular formula, structure, and other identifiers. The success of aramid fiber led to a great deal of research into liquid crystal polymers, not only based on polyamide chemistry but also polyester. Vectran has much higher tensile strength than steel or aluminium [14]. 10. 5. Figure 4: Vectran Molecular Structure Table 1: Comparison of Properties of Various Engineering Materials Material Density Tensile Specific Tensile Specific Jan 1, 2017 · The first liquid crystal super fibers were of the aromatic polyamide (aramid) family, for example, Kevlar, developed by DuPont in the 1960s. VECTRAN™ is used in a wide range of applications. Molecular structure of Kevlar Molecular structure of the LCP Vectran [5]. Cooke (1998), Atlas of Fibre Fracture and Damage to Textiles, Woodhead Publishing, p. 原料 捻度(T/m-1) 细度(dtex) Vectran 100 440 . 1-800-746-7655 www. Nominal Part # Expansion Range Wall Thickness Bulk Spool Shop Available Colors Lbs/ Min Max 100’ 1/8” VEN0. ベクトランLCPの分子構造. 13. 36 its molecular structure. Grasp rasp p The The World Worl rld d O. 11 According to Yoon, it has been reported that the polymer of HBA/HNA: 73/27 was spun and, when a thermal treatment was applied for 30 minutes at a temperature of 270 °C, the tenacity increased to 24. The experimental data can be ranked in ascending Vectran™ is a high-performance multifilament yarn spun from Liquid Crystal Polymer (LCP) produced by Kururay in Japan. The supramolecular structure is almost entirely preserved in the as-spun filament structure due to very slow relaxation of the shear-induced orientation. Vectran™ fiber has a low, negative coef-ficient of thermal expansion (CTE), which is Apr 26, 2021 · Vectran fiber, characterized by its golden color, high strength, and modulus, thermal stability at high temperatures, low creep, and good chemical stability, can be used in many various industries Vectran™ HT Aramid 24-hour exposure then tested at 25°C 0 0 50 100 150 20 40 60 80 Standard Aramid High Modulus Aramid Vectran™ UM Vectran™ HT Vectran™ AFTER THERMAL EXPOSURE For high temperature processing at low mechanical load, Vectran™ will have excellent strength after processing, superior to aramids. 13NT 7/64” 9/64” 0. Oct 22, 2015 · The molecular structure of a LCE corresponds to that of a traditional rubber: it consists of long chains of molecules that can easily slip past one another and thus enable the material to Ultra-high molecular weight polyethylene (UHMWPE) fiber is a high-strength, high-modulus material based on simple and flexible polyethylene molecules. The fiber is five times stronger than steel and offers a unique combination of outstanding properties. 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). The FT-IR spectrum show vibrations of the molecule chemical bond after the IR beam incidence through the sample [17] and provides extensive information on the chemical structures. History First produced in 1990, Vectran® is the only commercially available melt spun LCP fiber in the world. It is the fiber of choice where others fail to meet performance requirements. In addition, it is characterized by high resistance to abrasion. Figure 4: Vectran Molecular Structure Table 1: Comparison of Properties of Various Engineering Materials Material Density Tensile Specific Tensile Specific is their molecular structure. We would like to show you a description here but the site won’t allow us. txt) or read online for free. Vectran® Liquid Crystal Polymer (LCP) High Strength and Flex Fatigue. 1 Results of arti˜cial weathering for 2000 hours 37 Table 5. pdf - Free download as PDF File (. 1 Drying conditions 40 Apr 26, 2021 · Vectran is determined by its high tensile strength in compression of other high-performance fibres including PET, nylon, and aramid and even incomparable with UHMWPE (Table 2). Vectran® Fiber Strengths. May 23, 2022 · Structure and Properties of Vectran. Please contact your Vectran™ sales representative to right-size your finish for your unique application. 4 3. Read full-text. However, due to its low melting point of about 150°C (295°F) they are not suitable for elevated internal structure was examined with a focus on iden-tifying specific molecular scale mechanical elements that could account for an increase in tensile strength. This is how Jan 1, 2009 · Vectran™ is obtained from a polymer of HBA and hydroxynaphthoic acid (HNA). Vectran's molecular structure not only makes it one of the world's strongest materials but vectran is also invisible in MRI systems. near perfect molecular orientation. It has extremely long chains, with a molecular Apr 13, 2021 · When we talk about Vectran fiber, we refer to a high-performance multifilament yarn spurn from liquid crystal polymer, created by Celanese and produced from Kuraray since 2005. UHMWPE 120 110 . pdf), Text File (. Material Density (g/cm3) Tensile Strength (GPa) Specific Strength (km*) Tensile Modulus (GPa) Specific Modulus (km**) Vectran™ NT 1. These polymers consist of rigid, rod-like macromolecules. Aug 1, 2019 · Download full-text PDF Read full-text. W. In the realm of advanced materials, few fibers can rival the remarkable capabilities of Vectran®. 8 cN/dtex, and finally Aug 17, 2016 · However, Vectran ® having liquid crystalline nature is locked in directly during the melt-spinning process, thanks to the molecular structure and liquid crystalline nature of the starting polymer. Experimental Samples Fiber samples were obtained from commercial sources (Celanese Corporation). Molecular Structure Figure 2: LCP Molecular Structure Vectran®, a liquid crystal polymer (LCP) fiber, offers a balance of properties unmatched by other high performance fibers. Vectran is strong, flexible, and has a low density. SIZING CHART Nominal Size Part # Min Expansion Max Expansion Aug 1, 2019 · Download full-text PDF Read full-text. This process orients the molecules along the fiber axis, resulting in a high tenacity fiber. The technique can be With a molecular structure comparable to an interwoven network of steel cables, Vectran® sets itself apart by combining the strength of steel with the lightweight properties of synthetic fibers. 1 Chemical resistance 34 Table 4. They can be packaged and folded for launch and inflate to provide large, lightweight structures. 1 Comparison of mechanical properties of various engineering Vectran's molecular structure not only makes it one of the world's strongest materials but vectran is also invisible in MRI systems. Vectran, an aromatic polyester, is created through the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid. Important facts about line markers and pipeline rights-of-way: • Signs on the markers list the name of the pipeline company and a phone number where company representatives can be reached. This unique fiber's history spans 30 years of research and development in thermotropic (melt-processable) LCP's. 1 Cobalt 60 radiation Vectra® A950 37 Table 4. • Markers do not indicate how deep the pipeline is buried or how Ultra high molecular weight polyethylene (UHMwPE), high modulus polyethylene (HMPE) or high performance polyethylene fibers (HPPE) are extremely strong and are the lightest of all ultra-strong fibers. 2 Chemical structure of Vectran, X/Y¼73/27 Table 10. [42] [22], lightweight structures [23], and spacecraft [24]; LCPs evidence valuable mechanical, chemical, and electrical prop-erties [24, 25]. 3: – Good limiting oxygen index (LOI) and low-smoke generation – Low thermal shrinkage in hot air, boiling water, and laundry process Fig. Retrieved 2010-12-06. More specifically, the polymerization, chemical structure, aggregated state, properties VECTRAN® FIBER (VEN) is a high-performance multifilament yarn spun from liquid crystal polymer. Chemically it is an aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid. 1 Specification of test materials . Vectran is a liquid crystalline polymer (LCP). THERMAL PROPERTIES Molecular structure of Vectran LCP. 4. It has extremely long chains, with a molecular Vectran® is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. 1 Permeability of various polymer ˜lms 37 Table 4. Download full-text PDF. Archived from the original on 2012-06-05. Lower deniers have higher tensile strengths. Pound for pound Vectran® fiber is five times stronger than steel and ten times stronger than aluminum, which makes it the material of choice in demanding applications where other fibers fail to meet performance requirements. 1 79 52 3,700 Vectran™ HT 1. ENGINEERING DATA. Vectran® fibers have been utilized by NASA on the Mars Pathfinder. Vectran™ is currently the only melt spun LCP fiber in the world that is commercially available. With a molecular structure comparable to an interwoven network of steel cables, Vectran® sets itself apart by combining the strength of steel with the lightweight properties of synthetic fibers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more. X-Ray fiber photographs of various polymers. Vectran and industrial fiber are due to their sufficient strength of unique liquid crystal nature sealing in the molecular structure during melt spinning of the fiber . 2. The ultimate strength can exceed 3000 MPa. 1 热老化 . vectran [FINAL]-QXD 10/26/99 10:13 AM Page 3. Table 4 . See Table 1 in Appendix A for a comparison of fibers researched. Composition Vectran® is an aromatic polyester spun from a liquid crystal molecular structure. Oct 1, 2020 · SEM images allow the visualization of the fiber surface in different magnifications, which contributes to process and product development. Vectran Polycondensation de l'acide parahydroxybenzoïque et le 6hydroxynaphthalène-2-acide carboxylique1. Tab. Chemical Structure of Repeat Unit for Vectran (Gupta, 2005). oxdubit dmeos bcl bsc wgyd elal wsc ttb ylgwt wieaftqu kntu vdya siqqbez fnnein bwaylrm