Non-isothermal crystallization kinetics of semi-biobased nylon 5T/510
Semi-biobased nylon(PA5T/510)was prepared by melt polymerization using the biobased monomer 1,5-pentane-diamine as the raw material,and the non-isothermal crystallization behaviors of PA510 and PA5T/510 and PA5T were investigated using differential scanning calorimetry and the kinetics of non-isothermal crystallization were analyzed by the Jeziorny equation and the Mo Chi-Shen method,respectively.The results of the Jeziorny equation analysis show that PA5T/510 has the lowest crystalliza-tion temperature and the slowest crystallization rate compared to PA5T and PA510.The crystallization growth of PA5T/510 during the non-isothermal process is in two or three dimensions,which is affected by the cooling rate.The results of the analysis of Mo Chi-Shen method show that the crystallization rate of PA5T/510T is lower than that of PA510 and PA5T at the same degree of crystallini-ty.The activation energy of PA5T/510 is calculated by Kissinger equation as-120.486 5 kJ/mol,which is smaller than the activa-tion energy of non-isothermal crystallization of PA510(-205.014 9 kJ/mol)and PA5T(-252.762 2 kJ/mol),indicating that PA5T/510 has the lowest crystallization rate and the weakest crystallization ability compared with PA510 and PA5T.
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