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Polyurethane - Wikipedia, the free encyclopedia
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日期：2026-04-23
Polyurethane (PUR and PU) is a polymer composed of a chain of organic units joined by carbamate (urethane) links. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available. Polyurethan...看更多
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