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Nylon 66
Nylon 66 (aka nylon 6-6, nylon 6/6 or nylon 6,6) is a type of polyamide or nylon. Nylons come in many types, and the two most common for textile and plastics industries are nylon 6 and nylon 66. Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name.〔Palmer, R. J. 2001. Polyamides, Plastics. Encyclopedia Of Polymer Science and Technology. 〕
== Synthesis and manufacturing of Nylon 66 ==
Nylon 66 is synthesised by polycondensation of hexamethylenediamine and adipic acid. Equivalent amounts of hexamethylenediamine and adipic acid are combined with water in a reactor. This is crystallized to make nylon salt, which has precisely stoichiometric equivalents. The nylon salt goes into a reaction vessel where polymerization process takes place either in batches or continuously. Removing water drives the reaction
n HOOC-(CH2)4-COOH + n H2N-(CH2)6-NH2 → (CH2)4-CO-NH-(CH2)6-NH- )n + 2n H2O
toward polymerization through the formation of amide bonds from the acid and amine functions. Thus molten nylon 66 is formed. It can either be extruded and granulated at this point or directly spun into fibres by extrusion through a spinneret (a small metal plate with fine holes) and cooling to form filaments.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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