The Synthesis and Some Properties of Nylon
نویسنده
چکیده
The synthesis of nylon 4,T from tetramethylenediamine and a terephthalic acid derivative was studied in a two stepprocess: prepolymerization, followed by postcondensation in the solid state (4 h, m C ) . The prepolymers were prepared by the nylon salt method, ester polymerization method, interfacial method, and a low temperature solution method. A maximum qinh of 1.52 was obtained. From a solution in trifluoroacetic acid, films were cast and on these fdms we studied its IR spectrum, WAXS, and melting behavior with DSC. A boiled up sample had a double melting transition at 434 and 475'C and a AHfof 130 J/g.
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