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  • Epoxy
    Epoxy polymers are cured to form thermoset resins by either homopolymerization of epoxy groups with themselves, or reaction with curing agents such as anhydrides, amines, and novolacs. Because the curing agent contributes significantly to the cured properties of the resin, this is called
  • Thermoset Composites
    or of a combination of carbon and glass fibers, laid up in multilayer fashion to form extremely rigid, strong structures. More than 95% of thermoset composite parts are based on polyester and epoxy resins; of the two, polyester systems predominate in volume by far. Other thermoset resins used
  • Predicting plastic part life
    Dynamic mechanical analysis helps designers build longer lasting products. Edited by Jean M. Hoffman DMA testing helps determine the effect of different curing conditions on thermoset polyester products. DMA demonstrates the degree of cure based on the stiffness and glass transition temperature
  • Self-Healing spacecraft
    . Possible self-healing concepts for polymer matrix composites. A photomicrograph shows the cross section of a four-layer composite that has been damaged and then was selfhealed. The healing epoxy resin was dyed so that it would illuminate under UV light. This clearly illustrates the extent
  • Secrets of Bond Strength
    the maximum strength and long-term resistance to deterioration is through a chemical or electrolytic pretreatment, particularly on thermoset and thermoplastic surfaces. Molded, cast, and laminated parts made f rom thermos et plastics such as glass-reinforced epoxy (GRE), glass and carbon-reinforced
  • Adhesives
    and prevent damage that might occur if a stiff fastening system were used. Thermoset adhesives, such as epoxies and anaerobics, can be formulated to retain much of their strength over a broad temperature range, up to 300 F. Selecting a curing temperature close to the operating temperature can

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