Abstract
The mechanism of the magnetic field influence on polymer bulk crystallization has been discussed, which included nucleation and crystal growth. We have constructed relative equations of crystallization kinetics based on the classic thermodynamic theory. The equations show that the “magnetocrystallization effect” (MCE) caused by the difference of magnetic energy between crystal and amorphous phases. It came from the difference of magnetic susceptibilities between crystal and amorphous phases. The “like-liquid-crystal phase” induced by magnetic field in some polymer is another possible reason of MCE, which have low entropy and change the free energy in crystallization. They could affect the process of nucleation, crystal growth, the entire formula of crystal kinetics. We used “Matlab” software to figure the function of nucleation critical parameters and crystal free energy, the pictures indicated that small free energy changed by the temperature or magnetic field could greatly impact on the values of nucleation critical parameter with low degree of supercooling.
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