![]() This non-dimensional parameter describes the ratio of the fluid relaxation time scale to that of the experimental time scale. In theological terms, the experimenter is distorting the Silly Putty over a range of Deborah numbers. The behavior of this fascinating material gives insight into the rheological behavior of many materials. In addition, if a shock or impulsive load is applied to the Putty, it will shatter. ![]() ![]() If rolled into a ball and dropped, the material bounces like an elastic material. However, upon more comprehensive inspection, the material is seen to sag under its weight, although the Putty does not flow indefinitely on a flat surface. These complex shapes appear to be permanent material distortions on short-time scales. Silly Putty can be easily kneaded, much like dough, into any shape desired. Boron lends it the critical property of being elastic on short-time scales and inelastic on long-time scales through its cross-links. When first handled, the initial impression was of a plastic material. It is a material that vividly demonstrates the richness and complexity of behavior that simple materials can produce. These are then packaged and transported to stores. This machine extrudes Silly Putty and cuts it into smaller amounts used as a golf ball size. The pieces are then fed into the hoppers, which pull taffy from the candy industry. First, the mixed material is cut by hand into small basketball-sized pieces. After the mixture is combined, it is transported to the cutting area. The ingredients are mixed in a large machine called a sigma blade mixer for manufacturing Silly Putty. The combination of silicone oil and boric acid gave Silly Putty a serendipitous design. Mixing water, white glue, borax, and borax can create a homemade recipe. Dry pigments and clay carbonate are added to make color and glitter. Silly Putty is a mix of silicone polymers (about 70 wt%), boric acid, and other chemicals. Six years later, it was introduced in the Soviet Union and then brought to Europe, becoming a massive hit in Germany and the Netherlands. Silly Putty became popular among children aged six to twelve years by 1955. Hodgson purchased the production rights from G.E., renamed Silly Putty, and packaged it in plastic eggs for Easter.Īlthough Hodgson presented it at New York’s International Toy Fair in February 1950, sales took off when an article in The New Yorker magazine appeared several months later. Peter Hodgson, an unemployed copywriter, recognized the potential of this toy as a marketing tool for children after seeing it advertised in a local toy shop as an adult gift. War Production Board, found it more practical than the synthetic rubber which was in production then. However, none of them, not even those at the U.S. General Electric (G.E.) had already shared the discovery with scientists all over the globe by 1945. The substance didn’t have all the characteristics needed to replace rubber. It also didn’t go moldy and had a high melting point. Non-toxic Putty bounced when dropped and could stretch further than regular rubber. The two researchers discovered that silicone oil and boric acid could be combined with bouncy material. Crayola’s history still states that Wright invented it in 1943. Warrick maintained throughout his life that Rob Roy McGregor he was the first to receive Silly Putty’s patent. James Wright is a Scottish-born inventor who worked for General Electric in New Haven. The Silly Putty inventors were Earl Warrick, Harvey Chin, and James Wright. This shortage was solved by government-funded research into synthetic rubber compounds. Citizens were encouraged to ensure that their rubber products lasted and donate spare tires and boots until the end. Silly Putty was created during research into potential rubber substitutes for the United States in World War II.Īll rubber products in the United States were rationed. Boron cross-links give it the critical property of being elastic on short-time scales and inelastic on long scales. Silly Putty is an extraordinarily complex and sophisticated molecular engineering job. Silly Putty is one of those products that many of us have played with during our childhood but little did we know that Boron is the magic ingredient that makes it work. Silly Putty – Boron Boron and Silly Putty
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