PET结晶的完整性与热行为

提出以结晶密度表征结晶完整性。用X射线衍射测定了不同条件下结晶的PET晶胞参数和结晶密度,用差示扫描量热测其热行为,表明晶胞参数是可变的,PET试样的熔点随结晶密度呈线性变化。

CRYSTAL PERFECTION OF PET AND ITS THERMAL BEHAVIOUR

Crystalline density (or unit cell density) can be used to characterize the crystalperfection. The unit cell parameters and the crystalline density were determined byX-ray diffraction,and the thermal behaviour was measured by DSC.The results showthat the unit cell parameters are not a constant, and the melting point of PETchanges linearly as the crystalline density changes.