【摘要】 本文为探讨PET溶剂诱导结晶(SINC)的结晶机理与规律,用密度梯度法、差示扫描量热法(DSC)以及广角X射线衍射法(WAXS)研究了PET的SINC结晶过程,将扩散速度与结晶速度直接联系起来进行了定量处理,证实了结晶度随诱导时间变化的关系也可用菲克扩散定律来描述,结晶过程受扩散控制。上述各种研究方法求得的溶剂扩散系数,与用扩散前沿法、增重法等所得结果基本一致。更多还原

【Abstract】 In order to probes the crystallization Mechanism and rule for solvent induced crystallization(SINC) of PET, the kinetics of solvent induced crystallization process are investigated with aDSC, a WAXS and density gradient method, and has been carried out quantitative treatmentof the rate of diffusion directly correlate with the rate of crystallization. The experimentalresults showed that relationship of crystallisation with induced time change can also describesby the Fake diffusion rule and the crystallization precess is controlled by diffusion. Thediffusion coefficients of solvents which obtained by above-mentioned methods agree with thoseresulted from the weight uptake and liquid front penetration measurements.更多还原