Polycaprolactam Nylon

Uses. Monomer for manufacture of polycaprolactam (Nylon 6) used in carpets, textiles, clothing, and tires... 

According to the 1981-83 National Occupational Exposure Survey (NOES, 1997), approximately 25 000 workers in the United States were potentially exposed to caprolactam (see General Remarks). Occupational exposures to caprolactam may occur in the manufacture of the chemical and of polycaprolactam (nylon 6) fibres and resins. 

Filters can be grouped on the basis of different characteristics. For example, they can be grouped on the basis of the design capacity of the filters according to the particle concentration or loading [Svarovsky, 1981] or they can be grouped on the basis of the materials of the filters, e.g., fabric or nonfabric [Cooper and Freeman, 1982], Most filters in use are bag filters, which are fabric. The common fabric materials include cotton, polyester, wool, asbestos, glass, acrylic, polytetrafluoroethylene (Teflon), poly (m-phenylene isophthalate) (Nomex), polycaprolactam (Nylon), and polypropylene. 

What is the acid equivalent of polycaprolactam (nylon-6) with average DP 500 ... 

The other entries in Table 13.2 show that heat removal is not a problem for most ring-opening and condensation polymerizations. Polycaprolactam, (Nylon 6) is an addition polymer but with rather similar bond energies for the monomer and the polymer. The reaction exotherm is small enough that large parts are made by essentially adiabatic reaction in a mold. An equilibrium between monomer and polymer does exist for polycaprolactam, but it occurs at commercially acceptable molecular weights. 

What is the acid value of polycaprolactam (nylon-6) with average DF 500 [Note Acid value or acid number is defined as the number of milligrams of KOH required to neutralize 1 g of polymer.]... 

Moldings, fibers, tirecord poly(hexamethylene adipamide) (Nylon 6,6)e.g., Ultramid A polycaprolactam (nylon-6), e.g., Ultramid B, Akulon, Perlenka, poly(hexamethylene sebacamide) (Nylon-6,10), e.g., Ultramid S, Zytel. 

Although synthetic fibers and synthetic elastomers have the same chemical structure as plastics, they are not included among the latter group. Their identification will therefore be treated in this book only if they also occur as plastics. For example, polycaprolactam (Nylon 6) is used both for fiber production and as a molding material (see Sections 6.2.10 and 6.2.20). 

Polycaprolactame - Nylon 6 Poly(hexamethylenediamineadipamide) = Nylon 6.6 Copolyamides from Nylon 6 and 6.6 ... 

Polybutyl acrylate Polyvinyl acetate Polycaprolactam (Nylon 6) Polyethylene terephthalate (Terylene) Polyvinyl chloride... 

However, for illustrative purposes, we refer to two different applications of immiscible blends involving PCL. In one, solution blending of PCL with polycaprolactam (nylon 6) from solution in 1,1,1,3,3,3-hexafluoro-2-propanol (hex-afluoroisopropanol) is said to improve the impact resistance of nylon 6 [3]. In... 

The polyamide made from caprolactam is technically an addition polymer by the above definition, while the product made from the amino acid would be a condensation polymer. Actually, only the caprolactam synthesis is used commercially, and the product (polycaprolactam = nylon-6) is called a condensation polymer because all polyamides are so classified. 

TABLE C.3 Thermal-Physical Properties of Polycaprolactam, Nylon 6... 

---