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backbone, such as polyvinyl chloride, polyethylene , acrylic, silicone , and urethane. other classification systems include thermoplastic versus thermoset, elastomers, and engineering plastics. the development of plastics can be traced from the use of natural materials such as shellac to the use of chemically
first purely synthetic fiber, introduced by dupont corporation at the world's fair in new york city . in , dupont had begun a secret development project designated "fiber ," under its chemistry department director e.k. bolton and harvard chemist wallace carothers. carothers had been hired to perform pure...
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