Nylon Aromatic polyamides

Besides the aliphatic and aliphatic/aromatic nylons, aromatic polyamides have excellent capability to form fibers. Among aromatic polyamides the most common are Kevlar or poly(imino-1,4-phenyleneiminocarbonyl-1,4-phenylenecarbonyl) or poly(phenylene terephthalimide), and Nomex or poly(phenylene isophthalimide). These compounds are included in a group of polyamides known as aramids. The structures of Kevlar and Nomex are shown below ... [Pg.595]

Acetal Resin Acrylic Resin Acrylic/PVC Alloy Acrylonitrile Copolymer Amorphous Nylon Aromatic Polyamide ASA... [Pg.999]

Acrylic Resin Amorphous Nylon Aromatic Polyamide ASA CPVC CTFE ECTFE... [Pg.1000]

Aromatic linear polyester Aromatic linear rigid polyester Aromatic nylon Aromatic polyamides... [Pg.1047]

The family of synthetic polymeric materials with amide linkages in their backbones is laige. It includes synthetic linear aliphatic polyamides, which carry the generic name of nylon, aromatic polyamides, and fatty polyamides used in adhesives and coatings. In addition to the synthetic... [Pg.300]

Cellulose acetate is a common membrane material, but others include nylon and aromatic polyamides. The mechanism at the membrane surface involves the influent water and impurities attempting to pass through the pressurized side, but only pure water and certain impurities soluble in the membrane emerge from the opposite side. [Pg.362]

Fibers in which the basic chemical units have been formed by chemical synthesis, followed by fiber formation, are called synthetic fibers. Examples include nylon, carbon, boron fibers, organic fibers, ceramic fibers, and metallic fibers. Among all commercially available fibers, Kevlar fibers exhibit high strength and modulus. (Kevlar is a DuPont trademark for poly [p-phenylene diamine terephthalamide].) It is an aromatic polyamide (aramid) in which at least 85% of the... [Pg.813]

An increase in rod-like arrangement of the macromolecules can also arise by stretching a polymer either in its solid state, either in the melt or even in solution (for polymers leading to lyotropic liquid crystals such as aromatic polyamides). This is the basis of the development of synthetic fibres including high modulus polyethylene Dyneema , polyamide Nylons and Kevlar , polyester Tergal or Dacron fibres. [Pg.32]

Likewise, the Tm values of aromatic polyamides (aramids) arc higher than those of the corresponding aliphatic polyamides (nylons). The Tm of monadic and dyadic nylons decreases as the number of methylene groups in the chain increases. Thus the Tm values decrease stepwise as the number of... [Pg.84]

Nylon 6 is the homopolymer of caprolactam, and Kevlar is an aromatic polyamide, poly-p-phenylene terephthalamide. [Pg.410]

Aromatic polyamide membranes were developed by a few companies, including Toray, Monsanto and DuPont. DuPont developed a linear aromatic polyamide (nylon) membrane with pendant sulfonic acid groups, which they commercialized as the Permasep B-9 and B-10 membranes and is shown in Figure 4.7 (Permasep is a registered trademark of E. I. Du Pont De Nemours Company, Inc. Wilmington, DE). Just as CA membranes were created out of... [Pg.51]

High performance polymer fibers (HPPF) have excellent mechanical properties compared to traditional textile fibers such as nylon. The typical HPPFs are aramid and polyethylene fibers (6). Aramid is a generic name for a class of aromatic polyamide fibers, most of which are varieties of poly(p-pheny-lene terephthalamide). Kevlar is the trade name of the varieties of aramid polymers introduced conunercially by Dupont. The molecules in the fibers of these materials are oriented in the axial direction. Poly(p-phenylene terephthalamide) is a rigid molecule with the following structure ... [Pg.669]

Nylon 6T melts at 370 C, Nomex is practically flameproof. Kevlar, poly (p-phynyleneterephthalamide) represents a break-through in high modulus aromatic polyamide fibre and mainly used as reinforcement tyres, conveyers belt etc., PBI is... [Pg.33]

Parallel to the development of sheet membranes based on CA and CTA, the development of hollow fine fibers spun from nylon was made. With the development by Du Pont of the B-9 and B-10 perme-ators based on aromatic polyamides, the hollow fine fibers were a realistic alternative to CA membranes. [Pg.211]

In this chapter, therefore, some examples of the structural and dynamic analyses performed for polyamides such as nylon 4, 6, 7, 11 and 66, will be described including the oriented fibers of aromatic polyamides, poly(m-phenylene isophthalamide) (PMIA) and poly(4-methyl-m-phenylene tereph-thalamide) (P4-MPTA). [Pg.445]

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