Investigation on nonisothermal crystallization kinetics of the high-flow nylon 6 by differential scanning calorimetry
writer：Fan Zhang, Li Zhou, Yuanqin Xiong, Weijian Xu
keywords：nonisothermal crystallization kinetics
source：期刊
specific source：J Polym Sci Part B: Polym Phys 2008, 46, 2201–2211
Issue time：2008年
The crystallization kinetics of the high-flow nylon 6 containing polyamidoamine (PAMAM) dendrimers units in nylon 6 matrix was investigated by differential scanning calorimetry. The Ozawa and Mo equations were used to describe the crystallization kinetics under non-isothermal condition. The values of Avrami exponent m and the cooling crystallization function F(T) were determined from the Ozawa plots, which showed bad linearity and were divided into three sections depending on different cooling rates. The plots of the m and lgF(T) valuesversus crystallization temperatures were obtained, which indicated that the actual crystallization mechanisms might change with the crystallization temperatures. The high-flow nylon 6 has higher values of m implied that the high-flow nylon 6 had more complicated crystallization mechanisms and slower crystallization rate than pure nylon 6. The good linearity of the Mo plots verified the success of this combined approach. The activation energies of the high-flow nylon 6 ranged from 157 KJ/mol to 174 KJ/mol, which were determined by the Kissinger method. The ΔE values were lower than that of pure nylon 6, and meanwhile the ΔE was affected by both the generation and the content of PAMAM units in the nylon 6 matrix. and lgF(T) than pure nylon 6, which