half-crystallization time

According to DSC and non-isothermal crystallization kinetic analysis, with the increase of PET viscosity, the onset crystallization temperature shifted to the low temperature zone, half-crystallization time shortened and the crystallization rate slowed down.

根据DSC和非等温结晶动力学分析，随着PET粘度增大，结晶峰温度向低温方向偏移，半结晶时间增大，结晶速率降低，结晶变得困难，并且降温速率越快，PET越难结晶。

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at the early period of ssp, the crystallization temperature of co polymers increased, the half-crystallization time decreased.

在固相聚合反应初期，共聚酯的结晶温度上升，半结晶时间减少；

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