摘要：

The development of thermoplastic materials having more or less elastic properties started in the early 1930s with the invention of plasticization of poly vinyl chloride. A major breakthrough occurred with the discovery of the basic diisocyanate polyaddition reaction in 1937, which was first applied to produce polyurethane fibers and then to the development of some elastomeric polyurethanes at DuPont. The work at DuPont focused on elastic fibers and led to the invention of elastic linear copolyesters, prepared by melt-ester interchange between two melt copolymerized polymers. This synthetic elastomer had higher strength than vulcanized natural rubber and exhibited a rapid elastic recovery. It was used to make fibers by extrusion or spinning from solutions and can be considered to be the first thermoplastic elastomer. During the last two decades of the 20th century many new developments have taken place––such as, functionalized styrenic TPEs, new and improved TPVs, softer MPRs, and MPRs with improved physical properties, TPEs based on blends of natural rubber and polypropylene, thermoplastic fluoroelastomers, etc.

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