Nomex, structure

Nomenclature, see Naming Nomex, structure of, 1222 Nonbonding electrons, 9 Noncovalent interaction, 61-63 kinds of, 61-63... 

Mackey and Weil also list specific NR-P formulas for adhesives for printed circuits, leather-to-leather, bonding steel plates, and Nomex paper ([210], Tables 8 and 19, p. 219). The formula in Table 10, for a general structural adhesive, is also from Mackey and Weil ([210], Table 22, p. 219). 

Nomex, a polyamide used in such applications as fire-retardant clothing, is prepared by reaction of 1,3-bcnzenediamine with 1,3-benzenedicarbonyl chloride. Show the structure of Nomex. 

Honeycombs are structures with hexagonal or cylindrical cells made from thin sheets of aluminium, aramid (Nomex), paper or extruded polypropylene. The dimensions of the cells are generally in the range of 5 mm to 10 mm. The two faces are covered with a firmly adherent composite (or sometimes metal) skin. 

Poly( j-phenylene isophthalamide) (structure 4.59), sold under the trade name Nomex, exhibits good thermal stability decomposing above 370°C. It is used in flame-resistant clothing. It is also used in the form of thin pads to protect sintered silica-fiber mats from stress and vibrations during the flight of the space shuttle ... 

As pointed out in the preceding section, a second route for developing fibers having properties approaching the ultimate is the use of polymer chains that have high intrinsic stiffness and will remain extended in solution or melt. The development of aramid organic fibers based on aromatic polyamides met these requirements and added another chapter to the history of the development of synthetic fibers. Nomex aramid, a thermally resistant fiber based on a meta-oriented structure, was commercialized by the DuPont company in 1962. 

Draw the structure of the Nomex polymer. How do the structures of Kevlar and Nomex differ ... 

Draw the structures of Quiana and Nomex, two commercially available step-growth polymers formed from the given... 

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 ... 

Polyaramide - Commercial examples of these plastics include Kevlar and Nomex . Kevlar has the following chemical structure ... 

Figure 7.1 Chemical structures of the polymers Kapton, Kevlar, Nomex, and melamine resin.

---