Nylon 1
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Nylon 1
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^ Palmer, Robert J. (2002-01-01). "Polyamides, Plastics". Encyclopedia of Polymer Science and Technology . John Wiley & Sons, Inc. doi : 10.1002/0471440264.pst251 . ISBN 9780471440260 .
^ Magat, Eugene E.; Faris, Burt F.; Reith, John E.; Salisbury, L. Frank (1951-03-01). "Acid-catalyzed Reactions of Nitriles. I. The Reaction of Nitriles with Formaldehyde1". Journal of the American Chemical Society . 73 (3): 1028–1031. doi : 10.1021/ja01147a042 . ISSN 0002-7863 .
^ Magat, Eugene E.; Chandler, Leonard B.; Faris, Burt F.; Reith, John E.; Salisbury, L. Frank (1951-03-01). "Acid-catalyzed Reactions of Nitriles. II. Polyamides from Formaldehyde and Dinitriles". Journal of the American Chemical Society . 73 (3): 1031–1035. doi : 10.1021/ja01147a043 . ISSN 0002-7863 .
^ Que, Zeli; Furuno, Takeshi; Katoh, Sadanobu; Nishino, Yoshihiko (2007-03-01). "Effects of urea–formaldehyde resin mole ratio on the properties of particleboard". Building and Environment . 42 (3): 1257–1263. doi : 10.1016/j.buildenv.2005.11.028 .
^ Lenghaus, K; Qiao, G. G; Solomon, D. H (2001-04-01). "The effect of formaldehyde to phenol ratio on the curing and carbonisation behaviour of resole resins". Polymer . 42 (8): 3355–3362. doi : 10.1016/S0032-3861(00)00710-2 .
Nylon 1,6 (aka polyamide 1,6 ) is a type of polyamide or nylon . [1] Unlike most other nylons , nylon 1,6 is not a condensation polymer , but instead is formed by an acid-catalyzed synthesis from adiponitrile , formaldehyde , and water. The material was produced and studied by researchers at DuPont in the 1950s. [2] Synthesis can be performed at room temperature in open beakers.
Nylon 1,6 is synthesized from adiponitrile , formaldehyde, and water via acid catalysis . Adiponitrile and formaldehyde (aqueous, paraformaldehyde, or trioxane) are combined with an acid (typically sulfuric acid ) in a reactor. The reaction can be performed at room temperature. However, the reaction is exothermic, and especially at high ratios of formaldehyde to adiponitrile, cooling may be required.
CH 2 O + NC-(CH 2 ) 4 -CN + H 2 O → [-NH-CH 2 -NH-OC-(CH 2 ) 4 -CO-] n
Addition of water to the reaction mixture readily precipitates the nylon 1,6 product, which can then be isolated and washed with water to afford high purity polymer .
The DuPont evaluations of the 1950s era indicated that polyamide-1,6 was less acid stable than nylon 66 , and melts over 300–325 °C, with some decomposition. However, films were reported to have been successfully pressed at 275–290 °C. Molecular weight determined to be ~22,000–34,000 via an osmotic pressure method. [3] The polymer was believed to be significantly branched and cross-linked owing to side reactions occurring during the acid catalyzed polymerization, but this was not conclusively established.
Similar to other formaldehyde-based thermoset resins, thermal behavior of the polymer is a function of the CH 2 O/ADN ratio employed in the synthesis. [4] [5]
Melting point was found to increase with increasing synthesis CH 2 O/ADN ratio, along with apparent increase in cross-linking, and reduction in crystallinity. Additionally, spectral features of 1 H-NMR of nylon 1,6 samples were found to trend with CH 2 O/ADN synthesis ratio as well. Collectively, these properties parallel those of other formaldehyde-based thermoset resins, and it is interesting that nylon 1,6 is a rare example of a polyamide thermoset resin rather than a thermoplastic material.
Nylon 1,6 has been reported to exhibit a high moisture absorbance owing to the significant density of amide residues in the polymer, >130% of its weight (compare to ~2–2.5% for nylon 66 and nylon 6 ).
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Nylon
Strong, stiff engineering plastic often used to replace metal bearings and bushings
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Nylon is a strong, stiff engineering plastic with outstanding bearing and wear properties . Nylon is frequently used to replace metal bearings and bushings often eliminating the need for external lubrication. Other benefits include a reduction in part weight, less operating noise, and decreased wear on mating parts.
Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes and colors available upon request. Tube is also available in standard outer diameter sizes from 5 in – 40 in, complete our Get a Quote form for more information.
Nylons are typically described according to numbers (6, 66, 11, 12, etc.) which relate to their molecular structures. Although there are many types of Nylon, the two most common available in sheet, rod, and tube are Nylon 6 and Nylon 6/6 .
Nylon 6 and Nylon 6/6 – have very similar mechanical, thermal, and electrical properties. Both are available in a variety of colors and formulations that are engineered to meet specific application requirements. For Nylon 6 chemical resistance view our chart.
Nylon 6 – is generally manufactured into sheet, rod, and tube via a liquid casting process. Casting is often the most cost effective method for producing large diameter rod, tube, and thick sheet. This process has the added advantage of allowing manufacturers to create custom near net (irregular) shapes. Near net shapes are useful in the construction of parts that would yield poorly from standard sheet, rod, or tube stock.
Nylon 6/6 – sheet, rod, and tube are usually produced by melting solid pellets of the polymer and processing them through a thermoplastic extruder. Extrusion is a fast and economical method for making small diameter rod, tube, and thin sheet. Unlike cast Nylon 6 stock shapes, extruded Nylon 6/6 sheet, rod, and tubing can be manufactured to any length, which can be an advantage for cost effectively yielding finished parts.
Nylon Grades – Nylon is available in a variety of specialty formulas. Molybdenum disulphide-filled (MOS2) and oil-filled nylons have enhanced wear properties often eliminating the need for external lubrication. Heat-stabilized nylon withstands higher operating temperatures. Nylon is available in glass-filled grades for enhanced stiffness and strength. FDA compliant grades of nylon are available for direct food contact.
Nylon with Metal Core– Nylon billets can be manufactured into many different components including gears, rollers, sprockets and augers. In power transmission applications, NYMETAL® billets combine the performance advantages of nylon and metal into one cohesive unit.
Tech Tip – Nylon has relatively high moisture absorption compared with many other thermoplastics. Nylon parts that must perform in wet environments should be designed with tolerances that factor in dimensional changes due to moisture absorption.
Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.
Explore the physical, mechanical, thermal, electrical, and optical properties of nylon .
Sort, compare, and find the plastic material suited for your application using our interactive properties table .
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Dimensions:
12 in x 12 in – 48 in x 120 in
Thickness:
0.031 in – 4 in
Note: Type 6-Cast and Type 6/6-Extruded Sizes Vary
Sheet and Rod:
Natural, Green, Black
Tube:
Natural, Black
Unfilled, Glass-Filled, Oil-Filled, MOS2
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@ 264 psi
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Water absorption
(immersion 24 hours)
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linear thermal
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