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Chapter_7_-_Nylon_and_Aramid_Fibers_-_Fall_2011-_Student_Version

Chapter_7_-_Nylon_and_Aramid_Fibers_-_Fall_2011-_Student_Version

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Chapter 7 Nylon & Aramid Fibers nylon Wallace H. Carothers, DuPont Company a manufactured fiber in which the fiber- forming substance is a long-chain synthetic polyamide in which LESS than 85% amide linkages are attached directly to 2 aromatic rings. 1
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Chapter 7 Nylon & Aramid Fibers aramid 1974 – FTC – separate category polyamide in which 85% or MORE amide linkages are attached directly to 2 aromatic rings 2
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Nylon 2 Main Classifications nylon 6 – Europe nylon 6 & 66 – U.S. nylon 6 - Russia variants 7, 9 - film 3
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Nylon 6 & 66 isomers each polymer contains the same elements by weight the polymers’ molecules are arranged differently 4
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Nylon 1st synthetic fiber produced in U.S. DuPont Chemical Company 1938 commercial product today INVISTA Honeywell – Shaw Industries 3rd most used synthetic fiber 5
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Nylon - Manufacture nylon 66 “nylon salt” a compound 6 C in adipic acid AND 6 C in hexamethylene diamine 6 C in each molecule 6
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Nylon - Manufacture nylon 6 pure caprolactam raw material 6 carbon atoms 7
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