Exploring the Crystallization Behavior of Wet Separator During Rapid Cooling Process by Flash DSC
The rapid and non-isothermal crystallization behavior of ultra-high molecular weight poly-ethylene(UHMWPE)and paraffin oil mixed system from separator by wet process during extrusion casting was studied.The microstructure characteristics of different solid content systems under different cooling rates were characterized using Flash DSC and conventional DSC techniques.The results show that when the cooling rate is below 104 K/min,the initial crystallization temperature slowly decreases with the increase of cooling rate,and the obtained crystal melting temperature and thickness decreases with the increase of cooling rate;When the cooling rate is higher than 104 K/min,the initial crystallization temperature rapidly decreases with the cooling rate,while the crystal thickness does not change much;The higher the casting roll temperature,the higher the melting temperature of crystal of the cast film,the thicker the crystal thickness,and the higher the solid content of UHMWPE,the greater the difference between the crystal melting temperature and crystal thickness of the cast film obtained by high and low temperature casting rolls.
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