Kirk-Othmer Encyclopedia of Chemical Technology 2005
DOI: 10.1002/0471238961.0609020501142015.a01.pub2
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Polyamides, Fibers

Abstract: Polyamide fibers are melt spun from linear semicrystalline thermoplastic polymers having recurring amide groups made from diamines and dicarboxylic acids or lactams. Poly(hexamethyleneadipamide), designated as nylon‐6,6, and poly(caprolactam), nylon‐6, account for 98% of the 4 million metric tons of the worldwide annual production of nylon fiber. The attributes of nylon such as high strength, durability, abrasion resistance, resilience, moderate hydrophilicity, ease of dyeability, and low specific gravity have… Show more

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Cited by 5 publications
(12 citation statements)
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“…1 Five- and six-membered ring lactams with N -alkyl chains uniformly provided remote 3° and 2° C—H bond oxidation products in high yields and selectivities (Table 2, 8−11). The inductive effect of the imidate salt enabled high site-selectivities for Fe(CF 3 PDP) 2 -catalyzed oxidation at alkyl substitution α to the amide carbonyl: cyclopentyl substituted 5- and 6-membered lactams were oxidized with Fe(CF 3 PDP) 2 at the methylene sites most remote from this electron-withdrawing moiety to furnish ketones 12 and 13 .…”
Section: Resultsmentioning
confidence: 99%
“…1 Five- and six-membered ring lactams with N -alkyl chains uniformly provided remote 3° and 2° C—H bond oxidation products in high yields and selectivities (Table 2, 8−11). The inductive effect of the imidate salt enabled high site-selectivities for Fe(CF 3 PDP) 2 -catalyzed oxidation at alkyl substitution α to the amide carbonyl: cyclopentyl substituted 5- and 6-membered lactams were oxidized with Fe(CF 3 PDP) 2 at the methylene sites most remote from this electron-withdrawing moiety to furnish ketones 12 and 13 .…”
Section: Resultsmentioning
confidence: 99%
“…Nitrogen‐containing polymers are a special class of materials that exhibit useful features. Polyamides1(a) and polyimides1(b,c) are useful in a variety of applications. Quaternary salt polymers are used as anion exchange resins, coatings, adhesives, ion conductors and in water treatment and coagulation 2.…”
Section: Introductionmentioning
confidence: 99%
“…Quaternary salt polymers are used as anion exchange resins, coatings, adhesives, ion conductors and in water treatment and coagulation 2. Aromatic nitrogen‐containing polymers, such as polyimides,1(c) polyquinoxalines, polyquinolines, polybenzimidazoles, polybenzothiazoles, and polybenzoxazoles, exhibit excellent thermo‐oxidative stability and retain useful mechanical properties at elevated temperatures for extended times 3…”
Section: Introductionmentioning
confidence: 99%
“…Nitrogen‐containing polymers are a special class of materials that exhibit very useful features which can be attributed to (1) the basicity of the nitrogen atom(s), (2) hydrogen bonding 7 of N‐H moieties, and (3) quaternization. Polyamides, such as nylon‐6,6 and Kelvar™, possess remarkable strength due to hydrogen bonding between the carbonyl groups and the N H moieties and find applications in fibers and plastics 1111…”
Section: Introductionmentioning
confidence: 99%
“…Polyamides, such as nylon‐6,6 and Kelvar™, possess remarkable strength due to hydrogen bonding between the carbonyl groups and the N H moieties and find applications in fibers and plastics 111112.…”
Section: Introductionmentioning
confidence: 99%