Temperature Dependence of Linear Crystal Growth Rate

1 Temperature Dependence of Linear Crystal Growth Rate 

Kj is generally expressed as K = nbo Te Ju/2lH i, where n is a function of mode of secondary nucleation, bo is the thickness of the depositing growth layer, is the heat of fusion and Og and r are the end- and the lateral- 

The ratio of Tg and T°j is well known to be 2/3 for the most of polymers [44 6]. That is, To comes near to (l/2)T°j. This result is much used for the best fitting procedure for crystal growth data. Anyhow, the activation energy for molecular transport term can be expressed by either or Arrhenius 

AY [)mr were measured by a Rheovibron (Toyo Seiki) at a heating rate of 2°C/min and a frequency of lOH over the temperature range from 150 C to 200° C. These phenomenological results suggest that the activation energy for the molecular transport term in polymer crystallization is associated with molecular diffusion in the super-cooled melt above T. This indicates that the activation process in molecular transport in polymer crystalUzation could be similar to that in the confined molecular motion in the rubbery state above T 

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