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Smart rubber will recover its original mechanical strength within several hours of being split and then subsequently recombined. Residual hydrogen bond donors and acceptors responsible for the self-healing properties of the elastomer remain unpaired until the newly exposed surface comes in contact with another complementary surface, allowing formation of new intermolecular hydrogen bonds.
The pegboard for bead designs was invented in the early 1960s (patented 1962, patent granted 1967) by Gunnar Knutsson in Vällingby, Sweden, as a therapy for elderly homes; the pegboard later gained popularity as a toy for children. [8] Originally, the bead designs were not fused but glued to cardboard or masonite boards and used as trivets. [9]
Although the most common types of self-healing materials are polymers or elastomers, self-healing covers all classes of materials, including metals, ceramics, and cementitious materials. Healing mechanisms vary from an instrinsic repair of the material to the addition of a repair agent contained in a microscopic vessel.
Silver-colored Silly Putty. Silly Putty is a toy containing silicone polymers that have unusual physical properties. It can flow like a liquid, bounce and can be stretched or broken depending on the amount of physical stress to which it is subjected.
Self-amalgamating tape is a non-tacky silicone rubber tape that when stretched and wrapped around cables, electrical joints, hoses, and pipes combines or unites itself into a strong, seamless, rubbery, waterproof, and electrically insulating layer. [1] [2] Unlike many other polymers and fibers, it is heat-, sunlight-, and weather-resistant.
Poured rubber surfacing: This is a seamless rubber surface composed of two layers that is poured in place (PIP). The first layer, or "wear layer", is typically 3 ⁄ 8 inch (9.5 mm) thick and made of EPDM or TPV granules. The second layer, or "cushion layer", is 1–5 inches (25–127 mm) thick and made of crumb rubber or recycled rubber tires.
A bulletin board (pinboard, pin board, noticeboard, or notice board in British English) is a surface intended for the posting of public messages, for example, to advertise items wanted or for sale, announce events, or provide information.
The Henderson Safety Tank Company provided crash-proof self-sealing fuel and oil tanks which were fitted "as standard" to the Miles Master trainer. [2] German aircraft designers used layers of rubber laid over leather hide with a treated fiber inner surface for the self-sealing tanks on the Junkers Ju 88 early in the war. [3]