Nylon 8
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https://textile_dic_en_ru.academic.ru/5510/nylon-8
фирм. найлон 8 (полиамидное метоксиметилированное волокно найлон 66)
polymerdatabase.com/polymers/nylon8.html
Перевести · Thermophysical properties of Nylon 8. POLYMER CLASS: Polyamide: COMMON NAMES: Nylon 8, Poly(8-aminooctanoic acid), Polycapryllactam, Poly(octano-8 …
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What is the difference between nylon 66 and nylon 6?
What is the difference between nylon 66 and nylon 6?
Nylon 66 is suitable for textile use while nylon 6 is less suitable because of susceptibility to heat treatment of the latter; nylon 6 has a melting point of around 215 °C compared to that of nylon 66 which is around 260 °C. Nylon 6 is more amorphous and rate of dyeing is evidently higher than that on nylon 66.
www.sciencedirect.com/topics/chemistry/ny…
What is the chemical formula for Nylon 6?
What is the chemical formula for Nylon 6?
It possesses chemical formula: While nylon 6 is produced from caprolactum and has the general formula is: In short, H 2 N–F–COOH, ‘F’ being the fibre part with two different terminal groups, viz. − COOH and − NH 2 and few intermediate − CONH groups; the − NH 2 group controls dyeing behaviour in dyeing with anionic dyes.
www.sciencedirect.com/topics/chemistry/ny…
What is the dielectric constant of nylon 6?
What is the dielectric constant of nylon 6?
The dielectric constant of dry nylon 6 is 3.7 at 10 5 Hz and 20°C. The surface resistance is 2.0×10 12 MΩ and the specific resistance 2.6×10 8 MΩ. 1.11.2.4.9 Toxicity. Nylon 6 is absolutely free of all toxic properties, and is chemically inert. It will not cause irritation to the skin.
www.sciencedirect.com/topics/chemistry/ny…
What are the properties of nylon 6 fiber?
What are the properties of nylon 6 fiber?
Table 1. Typical properties of nylon 6 fiber. Nylon 6 typically exhibits a glass transition temperature of 48°C and a melt temperature of 214°C. It has a density of 1.14 g cm −3. Nylon 6 filaments have a smooth surface and are as featureless as glass rods.
www.sciencedirect.com/topics/chemistry/ny…
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Перевести · Search results for nylon 68 nylon 8 6 at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select …
https://en.m.wikipedia.org/wiki/Nylon
Ориентировочное время чтения: 8 мин
Опубликовано: 27.07.2001
Above their melting temperatures, Tm, thermoplastics like nylon are amorphous solids or viscous fluids in which the chains approximate random coils. Below Tm, amorphous regions alternate with regions which are lamellar crystals. The amorphous regions contribute elasticity and the crystalline regions contribute strength and rigidity. The planar amide (-CO-NH-) groups are very polar, so nylon forms multiple hydrogen bondsamong adjacent strands. Because the nylon bac…
Above their melting temperatures, Tm, thermoplastics like nylon are amorphous solids or viscous fluids in which the chains approximate random coils. Below Tm, amorphous regions alternate with regions which are lamellar crystals. The amorphous regions contribute elasticity and the crystalline regions contribute strength and rigidity. The planar amide (-CO-NH-) groups are very polar, so nylon forms multiple hydrogen bonds among adjacent strands. Because the nylon backbone is so regular and symmetrical, especially if all the amide bonds are in the trans configuration, nylons often have high crystallinity and make excellent fibers. The amount of crystallinity depends on the details of formation, as well as on the kind of nylon.
Nylon 66 can have multiple parallel strands aligned with their neighboring peptide bonds at coordinated separations of exactly 6 and 4 carbons for considerable lengths, so the carbonyl oxygens and amide hydrogens can line up to form interchain hydrogen bonds repeatedly, without interruption (see the figure opposite). Nylon 510 can have coordinated runs of 5 and 8 carbons. Thus parallel (but not antiparallel) strands can participate in extended, unbroken, multi-chain β-pleated sheets, a strong and tough supermolecular structure similar to that found in natural silk fibroin and the β-keratins in feathers. (Proteins have only an amino acid α-carbon separating sequential -CO-NH- groups.) Nylon 6 will form uninterrupted H-bonded sheets with mixed directionalities, but the β-sheet wrinkling is somewhat different. The three-dimensional disposition of each alkane hydrocarbon chain depends on rotations about the 109.47° tetrahedral bonds of singly bonded carbon atoms.
When extruded into fibers through pores in an industry spinneret, the individual polymer chains tend to align because of viscous flow. If subjected to cold drawing afterwards, the fibers align further, increasing their crystallinity, and the material acquires additional tensile strength. In practice, nylon fibers are most often drawn using heated rolls at high speeds.
Block nylon tends to be less crystalline, except near the surfaces due to shearing stresses during formation. Nylon is clear and colorless, or milky, but is easily dyed. Multistranded nylon cord and rope is slippery and tends to unravel. The ends can be melted and fused with a heat source such as a flame or electrode to prevent this.
Nylons are hygroscopic, and will absorb or desorb moisture as a function of the ambient humidity. Variations in moisture content have several effects on the polymer. Firstly, the dimensions will change, but more importantly moisture acts as a plasticizer, lowering the glass transition temperature (Tg), and consequently the elastic modulus at temperatures below the Tg
When dry, polyamide is a good electrical insulator. However, polyamide is hygroscopic. The absorption of water will change some of the material's properties such as its electrical resistance. Nylon is less absorbent than wool or cotton.
Characteristics
The characteristic features of nylon 6,6 include:
• Pleats and creases can be heat-set at higher temperatures
• More compact molecular structure
• Better weathering properties; better sunlight resistance
• Softer "Hand"
• High melting point (256 °C, 492.8 °F)
• Superior colorfastness
• Excellent abrasion resistance
On the other hand, nylon 6 is easy to dye, more readily fades; it has a higher impact resistance, a more rapid moisture absorption, greater elasticity and elastic recovery.
• Variation of luster: nylon has the ability to be very lustrous, semi-lustrous or dull.
• Durability: its high tenacity fibers are used for seatbelts, tire cords, ballistic cloth and other uses.
• High elongation
• Excellent abrasion resistance
• Highly resilient (nylon fabrics are heat-set)
• Paved the way for easy-care garments
• High resistance to insects, fungi, animals, as well as molds, mildew, rot and many chemicals
• Used in carpets and nylon stockings
• Melts instead of burning
• Used in many military applications
• Good specific strength
• Transparent to infrared light (−12 dB)
Flammability
Nylon clothing tends to be less flammable than cotton and rayon, but nylon fibers may melt and stick to skin.
Environmental impact, incineration and recycling
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Перевести · 1-48 of over 20,000 results for "92 nylon 8 spandex" Price and other details may vary based on size and color +2. NIKIBIKI. Plain Jersey 3/4 Sleeve Crew Neck Top NS5423H. 4.6 out of 5 stars 10. $23.50 $ 23. 50. FREE Shipping. NIKIBIKI. Ribbed Double Fiber Racerback Tank Top NS5092. 4.8 out of 5 stars 8.
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Nylon 8
