The crystallization kinetics has been investigated by differential scanning calorimetry for polyamide 1218

a novel even-even nylon with long allkyl segments．Avrami equation and Ozawa approach have been adopted to study both the isothermal and non-isothermal processes．It is shown that the Avrami equation is applicable for isothermal crystallization very well

and the calculated Avrami index n is 3

which demonstrates that the crystallization of nylon 1218 is growing with global tridimensional crystals in this situation. As for the non-iosthermal crystallization

the Ozawa methed only fits at fast cooling rates

and the calculated Ozawa index m is 4

which indicates nylon 1218

in non-isothermal terms

may crytallize by a way of homogeneous nucleation and tridimensional growth. In addition

the activation energies for isothermal and non-isothermal crystallization have been determined according to the Arrhenius and Kissenger methods

respectively. A comparison of the activation energy values of nylon 1218 with those of nylon 1012 and nylon 11 indicates that at same conditions an increase of the alkyl segment length in the nylon molecules is beneficial to their crystallization

and the even-even nylons with long alkyl segments are easier to crystallize than the single nylons.