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Introduction
Introduction
It is made of repeating units linked by amide bonds and referred as polyamide. Nylon is first synthetic polymer which commercially successful. Nylon 6-6 is a polyamide from nylon class . Nylon has many types. Most common types are Nylon 6 and nylon 6-6 which are use in textile and plastic industry. The polymer (Nylon 6-6) is made of hexamethylenediamine and adipic acid. It has 12 carbon atoms in every repeating group.
Nylon 6,6
chemistry behind Nylon 6,6
chemistry behind Nylon 6,6
Nylon 6,6 is made from adipic acid and hexamethylene diamine through a step growth polymerization and condensation polymerization. Acids act as catalysts in polymerization process upon reaction between two starting materials generates the amide containing dimer with spilt off of a water molecule. Then dimers react with other dimers ,trimers, and bigger oligomers. This keeps happening until they become big enough to be called polymers.
HOW TO MANUFACTURE
Nylon 6,6 is made of hexamethylene diamine and adipic acid, which give nylon 6,6 a total of 12 carbon atoms, and its name.
1. Hexamethylene diamine and adipic acid are combined with water in a reactor. This produces nylon salt. The nylon salt is then sent to an evaporator where excess water is removed.
2. The nylon salt goes into a reaction vessel where a continuous polymerization process takes place. This chemical process makes molten nylon 6,6
3. The molten nylon 6,6 undergoes a spinning process, where the nylon 6,6 is extruded and sent through a spinnerelt which is a small metal plate with fine holes. The nylon is then air-cooled to form filaments.
Demonstration of synthesis of Nylon 6,6 in the laboratory
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