A New Path for Lamination Adhesives: Leaping Time Barriers and Erasing Steps

Automotive manufacturers, particularly in North America, primarily use two-component waterborne, reactive hot-melt, and solvent-borne adhesives for laminating thermoplastic olefin, polyvinyl chloride and leather skins to polyethylene and polypropylene foams — for applications like interior door panels, consoles and instrument panels.

Posted in: White Papers, Automotive, Coatings & Adhesives, Materials, Automotive, Transportation

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The Lubricant Test Drive: How Lube Selection Can Improve Auto Performance in Extreme Underhood and Interior Applications

Faced with harsher environments and a wide range of automotive lubrication options, finding a lasting lubricant solution has become increasingly difficult. But solutions do exist.

Posted in: White Papers, Automotive, Materials

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Driving Auto Performance Through Lubricant Selection: How Lubricants Can Reduce Component Failures and Extend Vehicle Life

Lubricant selection may be the answer. As automotive environemnts become increasingly extreme, finding a lubricant that can withstand the rising temperatures and harsh conditions over an extended period is critical to optimal vehicle performance.

Posted in: White Papers, Automotive, Materials

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Highly Porous and Mechanically Strong Ceramic Oxide Aerogels

These materials provide improved environmental durability and elasticity for aerospace and terrestrial applications.NASA's Glenn Research Center (GRC) has developed and produced ultra-lightweight polymer cross-linked aerogels (X-Aerogels). These mechanically robust, highly porous, low-density materials are three times denser than native aerogels, but more than 100 times stronger. Aerogels are ultra-lightweight glass foams with extremely small pores (on the order of 10 to 50 nanometers). These materials are extremely good thermal insulators, with R values ranging from 2 to 10 times higher than polymer foams. Unlike multilayer insulation, aerogels do not require a high vacuum to maintain their low thermal conductivity, and can function as good thermal insulators at ambient pressure. In addition, they are good electrical insulators and have low refractive indices, both approaching values close to air. Aerogels are also excellent vibration-damping materials. Traditional aerogels, however, suffer fragility and poor environmental durability.

Posted in: Briefs, Materials

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Asymmetric Dielectric Elastomer Composite Material

This material has applications in artificial muscle and hearts, physical therapy/rehab devices, morphing aircraft, robotics, and sensors.This electronic active material converts a voltage input to a mechanical force and mechanical displacement output. As compared to prior dielectric elastomer (DE) systems, the material has reduced electrode spacing, which lowers significantly the required operating voltage. In addition, the inclusion of a combination of conducting and/or non-conducting reinforcing fibers greatly enhances the strength of the material, without weight penalty.

Posted in: Briefs, Materials

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Method of Creating Micro-Scale Silver Telluride Grains Covered with Bismuth Nanoparticles

Potential applications include power generation and waste heat recovery, and refrigeration and cooling.NASA Langley Research Center has developed a novel thermoelectric (TE) material utilizing micro-scale silver telluride grains covered with bismuth nanoparticles. These materials have unique advantages in directly converting any level of thermal energy into electrical power and solid-state cooling by a reverse mode. Although thermoelectric devices are regarded advantageously with their high reliability, their lack of moving parts, and their ability to scale to any sizes, the devices’ energy conversion efficiency remains generally poor.

Posted in: Briefs, Materials

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Polyimides Derived from Novel Asymmetric Benzophenone Dianhydrides

NASA's Glenn Research Center invites companies to license or establish partnerships to develop its patented high-temperature, low-melt imide resins for fabrication of automotive components. Produced by a solvent-free melt process, these resins exhibit high glass transition temperatures (Tg = 370 to 400 °C), low melt viscosities (10 to 30 poise), long pot-life (1 to 2 hours), and can be easily processed by low-cost RTM and vacuum-assisted resin transfer molding (VARTM). These RTM resins melt at 260 to 280 °C, and can be cured at 340 to 370 °C in 2 hours without releasing any harmful volatile compounds.

Posted in: Briefs, Materials

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Nanotubular Toughening Inclusions

This technology is used for making stable resin dispersions and composite plastic films, and for standard polymer melt processing.NASA's Langley Research Center has developed an extensive technology portfolio on novel methods for effective dispersion of carbon nanotubes (CNTs) in polymers. The technology portfolio extends from making stable dispersions of CNTs in polymer resins to processes for making composite CNT/polymer films and articles. The technologies apply to a range of polymer types, enable low or high CNT loadings as needed, and can be used with a variety of standard polymer processing methods, including melt processing. Currently, the technology is being used commercially for electrically conductive polymer films for components in electronic printers and copiers.

Posted in: Briefs, Materials

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Metal Finishing White Paper: Electropolishing to Improve Corrosion Protection

One of the most common applications for electropolishing is to enhance corrosion resistance on a wide variety of metal alloys, specifically stainless steel. Electropolishing is quickly becoming a replacement process for a long established treatment: Passivation. Passivation is a chemical process that has been used for years to help restore contaminated stainless steel to original corrosion specifications.

Posted in: White Papers, Aerospace, Manufacturing & Prototyping, Materials

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Electric Field Activated Shape Memory Polymer Composite

Applications include intelligent medical devices, smart armor, turbine blade stabilization, and aircraft wing stabilization.NASA’s Langley Research Center has developed a novel shape memory polymer (SMP) made from composite materials for use in morphing structures. In response to an external stimulus such as a temperature change or an electric field, the thermosetting material changes shape, but then returns to its original form once conditions return to normal. Through a precise combination of monomers, conductive fillers, and elastic layers, the NASA polymer matrix can be triggered by two effects — Joule heating and dielectric loss — to increase the response. The new material remedies the limitations of other SMPs currently on the market; namely, the slow stimulant response times, the strength inconsistencies, and the use of toxic epoxies that may complicate manufacturing. NASA has developed prototypes and now seeks a partner to license the technology for commercial applications.

Posted in: Briefs, Materials, Electric power, Product development, Heat treatment, Composite materials, Polymers, Smart materials

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