Browse Topic: Resins
Eight arguments for these resins, compounds and composites. Weight reduction in EV battery components is an important factor in optimizing battery energy density, which in turn is critical to extending vehicle range and boosting power and performance. Although traditional metals such as steel and aluminum are widely used in EV batteries, the ongoing push for higher energy density is opening new opportunities for thermoplastic resins, compounds, and composites. The main advantage of these materials vs. metals is their inherent lighter weight - particularly in the case of lower-density polymers. Thermoplastics can be 30-50 percent lighter than metals. They also increase design freedom, which permits further weight-out through part consolidation and thin walls
Arsenic and ammonia in ground and surface waters pose significant health risks globally, especially for remote areas where access to safe drinking water is a concern for U.S. military personnel. Current removal materials and methods lack contaminant specificity. This study developed adsorptive resins and membranes specifically targeting arsenate and ammonia removal using molecularly imprinted acrylate polymers supported on graphitic carbon nitride. These materials showed comparable arsenate removal capacity to commercial resins. Higher ammonia removal capacity but lower selectivity was demonstrated by these materials in comparison to commercial resins. This research aims to enhance water treatment materials for ensuring clean drinking water access in remote military locations
Recycling of advanced composites made from carbon fibers in epoxy resins is required for two primary reasons. First, the energy necessary to produce carbon fibers is very high and therefore reusing these fibers could greatly reduce the lifecycle energy of components which use them. Second, if the material is allowed to break down in the environment, it will contribute to the growing presence of microplastics and other synthetic pollutants. Currently, recycling and safe methods of disposal typically do not aim for full circularity, but rather separate fibers for successive downcycling while combusting the matrix in a clean burning process. Breakdown of the matrix, without damaging the carbon fibers, can be achieved by pyrolysis, fluidized bed processes, or chemical solvolysis. The major challenge is to align fibers into unidirectional tows of real value in high-performance composites
Automobile parts often require materials that offer high strength and durability. With the continuous push for environmentally friendly solutions, natural fibers such as jute have emerged as a potential alternative for synthetic fibers in automobile components. In this study, we aim to enhance the properties of jute fibers by coating them with different polymers and assessing their suitability for automotive applications. We treated jute fibers with various polymers—low-density polyethylene, polyester, and araldite epoxy. The performance of these treated fibers was compared using fiber tensile experimentation, differential calorimetry, and dynamic mechanical evaluation. Our findings reveal that the treated jute fibers exhibit a tensile strength of 598 MPa. However, when coated with polymers, there’s a variance in strength: polyethylene (263 MPa), polyester (191 MPa), and epoxy (281 MPa). Among these, epoxy-coated fibers displayed the least tensile strength, while polyethylene-coated
Thermoplastic resins, composites, and copolymers can help the healthcare industry address multiple sustainability challenges. Specifically, thermoplastic materials can help manufacturers develop medical devices that
Epoxy polymers are widely used in various industries, e.g., as coatings, adhesives, and for lightweight construction due to their unique properties such as high strength, chemical resistance, and adhesion to various surfaces. Therefore, one of the most prominent applications is their use as matrix material in fiber-reinforced composites, which are heavily employed in the aerospace sector. However, the disposal of epoxy polymers and composites thereof has become a significant concern due to their recalcitrant nature and the adverse environmental effects caused by traditional recycling methods
Composites are especially important for the development and implementation of sustainable technologies such as wind power, energy-efficient aircrafts, and electric cars. Despite their advantages, their non-biodegradability raises challenges for the recycling of polymer and composites in particular. University of Hamburg, Hamburg, Germany Epoxy polymers are widely used in various industries, e.g., as coatings, adhesives, and for lightweight construction due to their unique properties such as high strength, chemical resistance, and adhesion to various surfaces. Therefore, one of the most prominent applications is their use as matrix material in fiber-reinforced composites, which are heavily employed in the aerospace sector. However, the disposal of epoxy polymers and composites thereof has become a significant concern due to their recalcitrant nature and the adverse environmental effects caused by traditional recycling methods. In this context, the overall production of plastic waste is
To grow the application space of polymer additive manufacturing (AM), the industry must provide an offering with improved mechanical properties. Several entities are working towards introducing continuous fibers embedded into either a thermoplastic or thermoset resin system. This approach can enable significant improvement in mechanical properties and could be what is needed to open new and exciting applications within the aerospace industry. Introduction of Continuous Fiber Reinforced Polymer: A New Additive Manufacturing Path for Aerospace examines a couple of unsettled issues that are beginning to come to light regarding these materials and focuses on the ability to design and provide robust structural analysis for continuous fiber reinforced polymer AM—unsung aspects that can make or break this new technology as it finds its way into the aerospace market. Without solutions to them, adoption by the aerospace industry will be limited to point design applications, thus constraining
This SAE Aerospace Recommended Practice (ARP) describes standard methods of heat application to cure thermosetting resins for commercial aircraft composite repairs. The methods described in this document shall only be used when specified in an approved repair document or with the agreement of the Original Equipment Manufacturer (OEM) or regulatory authority
This SAE Aerospace Standard (AS) specifies solid, un-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in glands in accordance with AS4716. They are usually used in hydraulic and pneumatic system components as anti-extrusion devices in conjunction with O-rings and other seals for static and dynamic applications
This SAE Aerospace Standard (AS) specifies solid polytetrafluoroethylene (PTFE) retainers (backup rings) for use in static glands in accordance with AS5857. They are usually for use in hydraulic and pneumatic systems as anti-extrusion devices in conjunction with O-rings and other seals
Ice and snow accretion on aircraft surfaces imposes operational and safety challenges, severely impacting aerodynamic performance of critical aircraft structures and equipment. For optimized location-based ice sensing and integrated ‘smart’ de-icing systems of the future, microwave resonant-based planar sensors are presented for their high sensitivity and versatility in implementation and integration. Here, a conformal, planar complementary split ring resonator (CSRR) based microwave sensor is presented for robust detection of localized ice and snow accretion. The sensor has a modified thick aluminum-plate design and is coated with epoxy for greater durability. The fabricated sensor operates at a resonant frequency of 1.18 GHz and a resonant amplitude of -33 dB. Monitoring the resonant frequency response of the sensor, the freezing and thawing process of a 0.1 ml droplet of water is monitored, and a 60 MHz downshift is observed for the frozen droplet. Using an artificial snow chamber
Mechanical engineering researchers at Michigan Technological University have created a way to make a 3D-printable nanocomposite polymeric ink that uses carbon nanotubes (CNTs) — known for their high tensile strength and lightness. This revolutionary ink could replace epoxies
Previous material solution for industrial inverter applications was PC/ABS for more than 10 years. Recently, PC/ABS has been reduced in the market due to customer needs for improved performance of existing materials and market trends for improved material like raising carbon credits are emphasizing the need for eco-friendly environmental technologies and rapidly growing smart factories to deliver, smart power consumption technologies for environmental protection and energy saving. This trend is rapidly changing in common life and various industries, so new material solutions are required to improve effective material solutions such as less or no outgassing, thermal stability and lower process temperature availability, color stability, better flame retardant properties and so on. In this study, according to new industry requirements, material evaluation was conducted with SABIC NORYLTM N-series PPE resins and incumbent PC/ABS material. Through various experiments, we confirmed the
Microfluidic devices are compact testing tools made up of tiny channels carved on a chip, which allow biomedical researchers to test the properties of liquids, particles, and cells at a microscale. They are crucial to drug development, diagnostic testing, and medical research in areas such as cancer, diabetes and now COVID-19. However, the production of these devices is very labor intensive, with minute channels and wells that often need to be manually etched or molded into a transparent resin chip for testing. While 3D printing has offered many advantages for biomedical device manufacturing, its techniques were previously not sensitive enough to build layers with the minute detail required for microfluidic devices. Until now
This specification covers a two-part epoxy resin system in the form of a bisphenol "A" epoxy resin filled with fumed silica and carbon microspheres and a separate curing agent
Natural fibers have been increasingly used in polymer composites during the last decade, and this has a significant impact on environmental implications. Natural fibers from lignocellulose materials have recently emerged in the form of fabric woven reinforced in polymer composites due to numerous applications, including structural and non-structural variants. One of the most promising materials for substituting synthetic polymeric materials by naturally available fiber reinforcements in polymer composites is woven fabric. Bamboo/Bamboo woven fabric encompasses bamboo yarn in both the warp and weft directions was chosen for this study. Bamboo/bamboo twill woven fabric acting as a reinforcement in the composites with epoxy resin as a bonding material using the compression moulding method of manufacturing. The mechanical characterization of twill woven fabric bamboo/bamboo reinforced composites was examined using five dissimilar fiber loading conditions (30:70, 35:65, 40:60, 45:55, and 50
Natural fibre reinforced composites (NFRCs) are potential members for structural and non-structural applications in the automobile and aerospace industries. They are promising environmentally friendly materials and are likely to replace synthetic fibre-reinforced composites (SRFC). In this work, abaca/epoxy composites were fabricated using the hand-layup method. The impact tests (Charpy and Izod) and thermal stability test (TGA-DSC Analysis) were conducted on abaca/epoxy reinforced composite (AFRC) samples. The impact test is a standardized high-strain rate test used to determine the amount of energy absorbed by a material during fracture. The specific impact strength of AFRC is 80 N/mm and 10 N/mm For Charpy and Izod tests, respectively. SEM analysis revealed that fibre-pull out is a major failure. The thermal stability of AFRC is 650 oC, and the residual mass is 6.95
Recent measures taken to protect the environment have paved the way for composite materials reinforced with natural fiber, which has forced manufacturing giants to search for a fill-in for conventional reinforcing materials. As a result, extensive research efforts have been put into the synthesis, manufacture, and production of bio-derived polymers. One such type of bio-derived polymer is natural fibre composite materials. Natural fibre reinforced composites (NFCs), as the name designates, are made of natural resources and thus possess environmentally beneficial properties like biodegradability. Firstly, sugarcane bagasse polymer composite is prepared and it’s behaviour is determined by subjecting to tensile and bending loads. Later, the effect of Sapodilla seed shell powder on Sugarcane Bagasse fibre reinforced Epoxy composite materials is investigated in this study. Hand-layup approach is utilized in this study in preparation of samples. The results show that the addition of
The goal of this research was to use renewable resources derived from plants and other sources to prepare high-performance carbon fiber and thermosetting matrix resins with high strength and high thermal resistance. The scientific objectives were to 1) develop methods for breaking down, modifying, and processing renewable resources to make epoxy resins, vinyl resins, and carbon fibers, and 2) determine structure-property relationships for these novel materials
This research paper determines the vibrational response of different weight percentages of titanium dioxide (TiO2) nanoparticles on carbon/epoxy composite tubes. The modal analysis was performed using Ansys Composite PrepPost (ACP) with fixed-fixed and cantilever boundary conditions. The models were analyzed with a winding angle of ±55° and compared with winding angles ±65° and ±75°. Modal analysis was also performed by embracing flax fibers on Carbon Fiber-Reinforced Polymers (CFRP) nanocomposite tubes with different layering sequences such as Carbon/Carbon/Carbon/Flax (C/C/C/F), Carbon/Flax/Carbon/Flax (C/F/C/F), and Carbon/Flax/Flax/Flax (C/F/F/F). The results indicated that, by the addition of TiO2 nanoparticles, the natural frequency of CFRP nanocomposite tubes gets increased. The natural frequencies were found to be higher in the fixed-fixed case than in cantilever conditions. The natural frequency of nanocomposite tubes with a winding angle of ±55° had shown approximately 4% and
Usage of fiber-filled thermoplastics in automotive structural applications are increasing due to their inherent advantages over metal, which include lighter weight and simplification in assembly. However, accurately predicting the performance of a fiber-filled thermoplastic part can be challenging due to presence of non-linearity and anisotropy in the material behavior. This paper describes material characterization and modeling of fiber-filled thermoplastics for accurate prediction of part performance to enable rapid use of these lighter materials in automotive applications. The grade used for the study is a 30% glass filled PEI, SABIC’s ULTEMTM 2300 Resin. Accuracy of the fiber orientation prediction is clearly demonstrated by the plaque level flow simulation validation with the CT-Scan data, followed by structural validations with specimen and part level tests. This study involves a representative cylinder-shaped part that accommodates different thicknesses and multiple
This specification covers a prepolymer in the form of an epoxy cresol novolac (ECN) resin
This specification covers an alicyclic diepoxy carboxylate prepolymer in the form of a low-viscosity liquid
This specification covers a heat-reactive, thermosetting, epoxy resin matrix in the form of a semi-solid. The resin matrix thermally cures to an epoxy polymer
This recommended practice describes the physical and chemical characterization techniques for identification of epoxy adhesive and prepreg resin systems in order to verify the chemical formulation, resin B-staging (See 8.1), cure reaction rates, adhesive moisture content, and resin component mix ratios, as necessary to achieve manufacturing and quality producibility and engineering performance
In the preform preparation stage of the RTM process, the fabric is draped on the mold along the geometry. Before the filling and warpage analysis, the draping analysis will be performed to get the fabric orientation. Due to the anisotropy of the fabric material, the main direction of the material has a significant influence on the overall flow behavior and warpage of the product. In this study, the advanced simulation approach for the RTM process is demonstrated. The filling and warpage analysis integrate with the draping simulation result. The influences of fabric shearing and fiber orientation on the resin flow and product warpage in RTM process is studied. With more accurate fabric orientation prediction methods, the accuracy of predicting fabric ply orientation is improved and more accurate infusion and product warpage simulation results can be obtained
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