Key Difference – Nylon 6 vs Nylon 66
Nylon 6 and nylon 66 are the most frequently used尼龙types in the world. The key difference between nylon 6 and nylon 66 is that尼龙6 is a monadic nylon derived from a diamine, while nylon 66 is a dyadic nylon derived from a diamine and a diacid.
Nylon refers to any polymer that comes underpolyamides，在其聚合物主链中具有酰胺连接。根据其应用，有各种类型的尼龙纤维具有广泛的性能。通常，尼龙纤维的最特征是它们的强度和轻重。此外，与许多其他合成纤维不同，它们具有很高的耐磨性。尼龙非常弹性，仅次于氨纶纱线和橡胶。尼龙具有弹性，使其对皱纹具有抵抗力。丝状尼龙的光泽具有类似于棉花和羊毛的外观。紧密编织的尼龙织物可能会感到轻盈，但它会捕获水分，空气和热量。因此，制作雨伞和雨衣的织物是理想的选择。昆虫和霉菌不影响尼龙。 However, exposure to sunlight can reduce the properties of nylon. Some more drawbacks of nylon include the attraction of lint and dirt and static buildup. The major applications areas of nylon include consumer electronics, automotive industry, packaging etc. There are two types of nylons, namely; the monaidic (-[RNHCO]n-), and the dyadic (-[NHRNHCOR’COn]-). The type of nylon is often abbreviated as ‘nylon x’ or ‘nylon xy’, where x and y represent the number of carbon atoms in the monomer(s) from which they are synthesized.
CONTENTS
1.Overview and Key Difference
2.What is Nylon 6
3.什么是尼龙66
4.Side by Side Comparison – Nylon 6 vs Nylon 66 in Tabular Form
5.概括
What is Nylon 6?
尼龙6是主要用作纤维形成的聚合物和工程塑料的最重要的尼龙之一。尼龙6通过ɛ-氨基酸氨酸或ɛ-caprolactam的熔体聚合合成。尼龙6在一定程度上吸收水分，然后g(玻璃过渡温度) of the nylon 6 is reduced with increasing moisture content.
Figure 01: Nylon 6 and Nylon 66
The zig-zag molecular conformation and the anti-parallel arrangement of Nylon 6 chains result in more hydrogen bonds between amide groups. The tensile properties of Nylon 6 also reduce with increasing moisture content. The tenacity of fibres can be improved by melt spun and hot drawing of fibres. When compared with nylon 66, nylon 6 has high impact strength. Cast nylon 6 is used to manufacture hug gears and bearings, fuel tanks, building shutters, and various parts of paper production machinery and construction equipment. Fiberglass reinforced nylon 6 resins are used produce automotive radiator shrouds, air ducts, structural components, fuel cells, and reservoirs.
什么是尼龙66?
尼龙66是由脂肪酸和己二胺的高温熔体聚合产生的二元尼龙。尼龙66是世界上最重要，最常用的尼龙之一，这是由于性能的优势和相对较低的价格。尼龙66的熔点约为260-265°C，Tgis about 50 °C when dry. Similar to nylon 6, nylon 66 consists of zig-zag chain conformation, resulting in intramolecular hydrogen bonds. Glass-fiber filled nylon 66 has excellent specific stiffness and toughness that enable it to be used in applications such as molded industrial drills and pump housing products. The tensile strength of nylon 66 is greater than that of nylon 6. The applications of molded nylon 66 include lawn mower blades, tractor hood extensions, bicycle wheels, skate wheels, skis for snowmobiles, bearings, electrical connections, and motorcycle crankcases. Nylon 66 fibers are used in clothing, fabric and rug industries.
What is the Difference Between Nylon 6 and Nylon 66?
Nylon 6 vs Nylon 66 |
|
| Nylon 6 is a monadic nylon derived from Ɛ-aminocaproic acid or Ɛ- caprolactam | Nylon 66 is a dyadic nylon derived from adiapic acid and hexamethylenediamine |
| Chemical Name | |
| poly-(6-aminocarproic acid) | poly- [imino-（1,6-二氧甲己酰甲基）伊米诺黑己乙烯] |
| Chemical Formula | |
| -(-NH-(CH2)5-CO-)- | -(NH-(CH2)6-NH-CO-(CH2)4-CO-)- |
| Crystalline Melting Point | |
| 结晶熔点为225°C。 | Crystalline melting point is 265 °C. |
| Impact Strength (Izod: cm-N/cm of notch) | |
| 160 | 80 |
| Density | |
| 1.15 g/ml | 1.2 g/mL |
| Recyclability | |
| 尼龙6可以recycled more times than nylon 66. | Nylon 66 is not as recyclable as nylon 6. |
| Tensile Strength | |
| 6.2 x 104kPa | 8.3 x 104kPa |
概括– Nylon 6 vs Nylon 66
Nylon 6 and nylon 66 are among the most important and widely using polyamides. Nylon 6 is a monadic nylon derived from Ɛ-aminocaproic acid or Ɛ- caprolactam, whereas nylon 66 is a dyadic nylon derived from adipic acid and hexamethylenediamine. This is the main difference between Nylon 6 and Nylon 66. Both types have high stiffness and toughness, hence use as engineering plastics in many industrial applications.
Reference:
1. Chanda, Manas, and Roy Salil K. “Industrial Polymers, Specialty Polymers, and Their Applications.” CRC Press, 2008.
2. Ibeh, Christopher C. Thermoplastic Materials: Properties, Manufacturing Methods, and Applications. CRC Press, 2011.
3. M, Alger. Polymer Science Dictionary. Springer Science & Business Media, 1996.
4. Carraher, Charles E. Carraher’s Polymer Chemistry. CRC Press, 2016.
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