According to the data obtained from Differential Scanning Calorimetry (DSC)

the method of Jeziorny

Вороховский and a new approach proposed by our laboratry are applied to study the nonisothermal crystallization behavior of poly(3-dodecylthiophene) (P3DDT) and poly(3-octadecylthiophene) (P3ODT)

and Kissinger method is used to get the value of the crystallization activation energy. The effect of the different alkyl substitution on crystallization is also investigated. In comparison to the methods of Jeziorny and Вороховский in which it can be found that the deviation from the line occurs in the later stage of crystallization

the new approach appears applicable due to the better linear relation. The values of the crystallization activation energy of P3DDT and P3ODT are estimated as 184.78kJ/mol and 246.93kJ/mol

respecivley

which implies that it is easiser to crystallize P3DDT than P3ODT.