Abstract:

The synthesis of co-polyamides consisting of ε-caprolactam and 5.9-19.7 wt.% of nylon salt ADETA, prepared from adipic acid + diethylenetriamine and the physical & thermal properties of polyamide 6 and co-polyamides, are reported. The content of this low molecular compound is comparable with that reported for crude polyamide 6. The molecular weight of each co-polyamide is lower. The melting temperature is lower in comparison with PA6, and corresponds to that of the nylon salt ADETA. The crystallisation ability of co-polyamides is higher, and secondary crystallisation mainly contributes to the higher degree of crystallinity. The state of organisation in co-polyamides, on the basis of ΔSm values, seems to be better, mainly for the samples with developed crystallisation (i.e. after a long period of crystallisation).