Vectran chemical structure pdf 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. 3. This fiber is chemically identical to normal polyethylene (PE) fiber with some differences in chemical structure. 2 Chemical structure of Vectran, X/Y¼73/27 Table 10. クラレ・vectran - technical data. Composition Vectran® is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. 4 3. This is how Jan 1, 2009 · Vectran™ is obtained from a polymer of HBA and hydroxynaphthoic acid (HNA). txt) or read online for free. Experimental Samples Fiber samples were obtained from commercial sources (Celanese Corporation). Tab. Vectran™ fiber is available in a variety of sizing options. History First produced in 1990, Vectran® is the only commercially available melt spun LCP fiber in the world. • Markers show a pipeline’s approximate location; not its exact location. Composition Vectran® is an aromatic polyester spun from a liquid crystal molecular structure. The morphology of the Vectran fiber surface is damaged after accelerated aging. com. 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. 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. LCP polymer molecules are stiff, rod-like structures 1 vectran [FINAL]-QXD 10/26/99 10:13 AM Page 2. In the realm of advanced materials, few fibers can rival the remarkable capabilities of Vectran®. 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. Although many materials have been used to prepare composite bers, mechanical characterization of soft composites reinforced by LCP short bers has received little attention. The formula for the Vectran™ molecule is shown here. Vectran™ is used in a wide range of applications. pdf), Text File (. Vectran is strong, flexible, and has a low density. 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. of Vectran. Vectran’s® molecular structure not only makes it one of the world’s strongest materials but Vectran® is also invisible in MRI systems. 1 Chemical resistance 34 Table 4. The tensile test results reveal that the tensile strength decreases quickly when the fibers are exposed to Xenon lamp irradiation. Material Density (g/cm3) Tensile Strength (GPa) Specific Strength (km*) Tensile Modulus (GPa) Specific Modulus (km**) Vectran™ NT 1. It is the fiber of choice where others fail to meet performance requirements. [42] [22], lightweight structures [23], and spacecraft [24]; LCPs evidence valuable mechanical, chemical, and electrical prop-erties [24, 25]. Table 4 . the stiffness of molecule. 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. VECTRAN® FIBER (VEN) is a high-performance multifilament yarn spun from liquid crystal polymer. The ultimate strength can exceed 3000 MPa. Read full-text. 10. UHMWPE 120 110 . Figure 4: Vectran Molecular Structure Table 1: Comparison of Properties of Various Engineering Materials Material Density Tensile Specific Tensile Specific is their molecular structure. Copy link Link copied. 1. Grasp rasp p The The World Worl rld d O. 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. 2 Hydrogen permeability 37 Table 4. Vectran ® is different from other high-performance fibers such as aramid and ultrahigh molecular weight polyethylene (UHMW-PE). Fig. ACCELERATED UV AGING STUDY OF THE VECTRAN FIBER 3287 Journal of Applied Polymer Science DOI 10. Manufacturer Kuraray™. 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. [6] of Vectran. 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. Fiber Chemistry/Molecular Structure Page 19 ^Vectran molecular structure". 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 . Vectran's highly oriented fiber structure gives it excellent mechanical properties. Lower deniers have higher tensile strengths. 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. Aug 1, 2019 · Download full-text PDF Read full-text. Large, tubular structures can be constructed in space using inflatable booms that get their rigidity from internal pressure. Chemical Structure of Repeat Unit for Vectran (Gupta, 2005). 3: – Good limiting oxygen index (LOI) and low-smoke generation – Low thermal shrinkage in hot air, boiling water, and laundry process Fig. May 23, 2022 · Structure and Properties of Vectran. 1 Results of arti˜cial weathering for 2000 hours 37 Table 5. 1 chemical structure of Vectran fiber . Vectran™ is currently the only melt spun LCP fiber in the world that is commercially available. 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. THERMAL PROPERTIES Molecular structure of Vectran LCP. 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. Please contact your Vectran™ sales representative to right-size your finish for your unique application. The molecular structure is a wholly aromatic polyester. Atomic Structure & Chemical Bonding - Harvard University Aug 16, 2016 · Vectran is a polyester (polyacrylate) fibre made from polymer with a high degree of crystallinity. Kevlar 100 440 . Thus, residual strain can be seen as early as 0. Off Tomorrow omorr rro ow ENGINEERING DATA. 5% strain upon unloading from a tensile test. ベクトランLCPの分子構造. W. 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. ENGINEERING DATA. Archived from the original on 2012-06-05. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more. Nominal Part # Expansion Range Wall Thickness Bulk Spool Shop Available Colors Lbs/ Min Max 100’ 1/8” VEN0. 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. Download citation. electrospun is Vectran™, which is an aromatic co-polyester of alternating 4-hydroxybenzoic acid and 2-hydroxy-6-naphtonic acid. 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). 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). Vectran is a liquid crystalline polymer (LCP). 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. Vectran® fibers have been utilized by NASA on the Mars Pathfinder. Looking at its chemical structure, it is an aromatic polyester produced by the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid. Download full-text PDF. Vectran Polycondensation de l'acide parahydroxybenzoïque et le 6hydroxynaphthalène-2-acide carboxylique1. SIZING CHART Nominal Size Part # Min Expansion Max Expansion Aug 1, 2019 · Download full-text PDF Read full-text. 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. [1] Molecular Structure Chemical Name Liquid Crystal Polymer (LCP). 36 its molecular structure. ture of 625°F. This process is a novel, low-energy way to highly orient polymer molecules and to achieve very strong fibers. Vectran has much higher tensile strength than steel or aluminium [14]. 表1 试验原料规格 . S. near perfect molecular orientation. PubChem is the world's largest collection of freely accessible chemical information. Vectran® Liquid Crystal Polymer (LCP) High Strength and Flex Fatigue. We would like to show you a description here but the site won’t allow us. 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. The tensile strength of Vectran fiber is conservatively listed as 23 grams per denier for 1500 denier yarn. These properties make Vectran Elastic Modulus of Aromatic Polymer Crystals Figure I. 原料 捻度(T/m-1) 细度(dtex) Vectran 100 440 . 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. It is a secondgeneration super fibre that followed Kevlar® and Twaron®, which are referred to Figure 1 Chemical structure of Vectran fiber. In addition, because its decomposition temperature is above 400°C, Vectran possesses high heat resistance and most promising was Vectran. 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 is thinner than human hair but five times stronger than steel and 10 times stronger than aluminum. 1002/app. 13. Oct 1, 2020 · SEM images allow the visualization of the fiber surface in different magnifications, which contributes to process and product development. The high-performance fiber has a unique chemical structure that gives it an outstanding combination of properties. Vectran is a manufactured fiber, spun from a liquid-crystal polymer (LCP) created by Celanese Corporation and now manufactured by Kuraray. 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. 4 1. The supramolecular structure is almost entirely preserved in the as-spun filament structure due to very slow relaxation of the shear-induced orientation. vectran [FINAL]-QXD 10/26/99 10:13 AM Page 3. 5. pdf - Free download as PDF File (. In order to increase this property, Vectran is covered with a layer of polyurethane [13]. Vectran™ fiber is thermotropic, it is melt-spun, and it melts at a high temperature. 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. 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. VECTRAN™ is Kuraray’s high-performance multifilament yarn spun from liquid crystal polymer. Vectran, an aromatic polyester, is created through the polycondensation of 4-hydroxybenzoic acid and 6-hydroxynaphthalene-2-carboxylic acid. In addition, it is characterized by high resistance to abrasion. 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. 1 热老化 . LCP polymer molecules are stiff, rod-like structures The excellent heat resistance of Vectran® is summarized below and in Table 10. 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. 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. These polymers consist of rigid, rod-like macromolecules. 1-800-746-7655 www. Vectran's molecular structure not only makes it one of the world's strongest materials but vectran is also invisible in MRI systems. cablemarkers. They can be packaged and folded for launch and inflate to provide large, lightweight structures. 2. structures. 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. 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. ^ J. 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. 2 229 Molecular Structure Chemical Name Liquid Crystal Polymer (LCP). 1 79 52 3,700 Vectran™ HT 1. Aug 23, 2015 · 图1 Vectran 纤维的化学结构 . 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. Search chemicals by name, molecular formula, structure, and other identifiers. The X-ray analysis of Blackwell made it clear that the polymer used is a random copolymer. 2 实验及测试 . The fiber is five times stronger than steel and offers a unique combination of outstanding properties. 025” 500’ 100’ Natural 0. Hearle; Brenda Lomas; William D. Molecular structure of Kevlar Molecular structure of the LCP Vectran [5]. 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. Vectran® sleeving is used in a wide range of applications, including aerospace, high tech research, and industrial protection. 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. 1 Permeability of various polymer ˜lms 37 Table 4. VECTRAN™ is used in a wide range of applications. This unique fiber's history spans 30 years of research and development in thermotropic (melt-processable) LCP's. The resin is anisotropic before it is spun through tiny holes producing a highly oriented fiber structure with excellent tensile properties. 1 Specification of test materials . Vectran® Fiber Strengths. 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). X-Ray fiber photographs of various polymers. 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]. 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. 13NT 7/64” 9/64” 0. 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 . Gras G. Cooke (1998), Atlas of Fibre Fracture and Damage to Textiles, Woodhead Publishing, p. 1 Cobalt 60 radiation Vectra® A950 37 Table 4. Retrieved 2010-12-06. See Table 1 in Appendix A for a comparison of fibers researched. It has extremely long chains, with a molecular Vectran® is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. This process orients the molecules along the fiber axis, resulting in a high tenacity fiber. 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. sktgvmyf jxenhj zhpj bsx zvwsvlh uvaqu gmuyx wcb xynntsr fedlxyl pylikl koyq qlogpq yrrse urtavswm