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  2. Rubber elasticity - Wikipedia

    en.wikipedia.org/wiki/Rubber_elasticity

    A rubber band is a single molecule, as is a latex glove. The sections of polyisoprene between two adjacent cross-links are called network chains and can contain up to several hundred isoprene units. In natural rubber, each cross-link produces a network node with four chains emanating from it.

  3. Sulfur vulcanization - Wikipedia

    en.wikipedia.org/wiki/Sulfur_vulcanization

    Worker placing a tire in a mold before vulcanization. Sulfur vulcanization is a chemical process for converting natural rubber or related polymers into materials of varying hardness, elasticity, and mechanical durability by heating them with sulfur [1] or sulfur-containing compounds. [2]

  4. Vulcanization - Wikipedia

    en.wikipedia.org/wiki/Vulcanization

    In ancient Mesoamerican cultures, rubber was used to make balls, sandal soles, elastic bands, and waterproof containers. [4] It was cured using sulfur-rich plant juices, an early form of vulcanization. [5] In the 1830s, Charles Goodyear worked to devise a process for strengthening rubber tires. Tires of the time would become soft and sticky ...

  5. Rubber band - Wikipedia

    en.wikipedia.org/wiki/Rubber_band

    A rubber band ball is a sphere of rubber bands made by using a knotted single band as a starting point and then wrapping rubber bands around the center until the desired size is achieved. The ball is usually made from 100% rubber bands, but some instructions call for using a marble , [ 16 ] a crumpled piece of paper , or a ping-pong ball [ 17 ...

  6. Stephen Perry (inventor) - Wikipedia

    en.wikipedia.org/wiki/Stephen_Perry_(inventor)

    Stephen Perry was a 19th-century British inventor and businessman credited with the invention of the rubber band. His corporation was the Messers Perry and Co,. Rubber Manufacturers of London, which made early products from vulcanised rubber, only recently perfected by Charles Goodyear in 1839. On 17 March 1845, Perry received a patent for the ...

  7. Rubber band experiment - Wikipedia

    en.wikipedia.org/wiki/Rubber_band_experiment

    The T-V diagram of the rubber band experiment. The decrease in the temperature of the rubber band in a spontaneous process at ambient temperature can be explained using the Helmholtz free energy = where dF is the change in free energy, dL is the change in length, τ is the tension, dT is the change in temperature and S is the entropy.

  8. Rainbow Loom - Wikipedia

    en.wikipedia.org/wiki/Rainbow_Loom

    Rainbow Loom is a plastic tool used to weave colourful rubber and plastic bands (called loom bands) into decorative items such as bracelets and charms. It was invented in 2010 by Cheong Choon Ng in Novi, Michigan .

  9. EPDM rubber - Wikipedia

    en.wikipedia.org/wiki/EPDM_rubber

    EPDM rubber (ethylene propylene diene monomer rubber) [1] [2] [3] is a type of synthetic rubber that is used in many applications. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers with a saturated polyethylene chain (the M deriving from the more correct term polymethylene).

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