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  2. Epoxy value - Wikipedia

    en.wikipedia.org/wiki/Epoxy_value

    The epoxy value is defined as the number of moles of epoxy group per 100g resin. So as an example using an epoxy resin with molar mass of 382 and that has 2 moles of epoxy groups per mole of resin, the EEW = 382/2 = 191, and the epoxy value is calculated as follows: 100/191 = 0.53 (i.e. the epoxy value of the resin is 0.53). [6]

  3. Araldite - Wikipedia

    en.wikipedia.org/wiki/Araldite

    The first batches of Araldite epoxy resins, for which the brand is best known, were made in Duxford, England in 1950. [1] Araldite adhesive sets by the interaction of an epoxy resin with a hardener. Mixing an epoxy resin and hardener together starts a chemical reaction that produces heat – an exothermic reaction. [2]

  4. Expensive Desk Calculator - Wikipedia

    en.wikipedia.org/wiki/Expensive_Desk_Calculator

    Expensive Desk Calculator by Robert A. Wagner is thought to be computing's first interactive calculation program. [1] The software first ran on the TX-0 computer loaned to the Massachusetts Institute of Technology (MIT) by Lincoln Laboratory. It was ported to the PDP-1 donated to MIT in 1961 by Digital Equipment Corporation. [2]

  5. Epoxy - Wikipedia

    en.wikipedia.org/wiki/Epoxy

    Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide functional group is also collectively called epoxy. [1] The IUPAC name for an epoxide group is an oxirane.

  6. Comparison of HP graphing calculators - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_HP_graphing...

    A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. While there are several companies that manufacture models of graphing calculators, Hewlett-Packard is a major manufacturer. The following table compares general and technical information for Hewlett-Packard graphing ...

  7. Fiberglass - Wikipedia

    en.wikipedia.org/wiki/Fiberglass

    Furthermore, by laying multiple layers of fiber on top of one another, with each layer oriented in various preferred directions, the material's overall stiffness and strength can be efficiently controlled. In fiberglass, it is the plastic matrix which permanently constrains the structural glass fibers to directions chosen by the designer.

  8. HP 48 series - Wikipedia

    en.wikipedia.org/wiki/HP_48_series

    The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003. [1] The series includes the HP 48S , HP 48SX , HP 48G , HP 48GX , and HP 48G+ , the G models being expanded and improved versions of the S models.

  9. Carbon-fiber reinforced polymer - Wikipedia

    en.wikipedia.org/wiki/Carbon-fiber_reinforced...

    Carbon nanotube reinforced polymer (CNRP) is several times stronger and tougher than typical CFRPs and is used in the Lockheed Martin F-35 Lightning II as a structural material for aircraft. [48] CNRP still uses carbon fiber as the primary reinforcement, [49] but the binding matrix is a carbon nanotube-filled epoxy. [50]

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