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作者:: 朱爱臣; 李俊起△; 张素文; 刘阳; 尹弢; 马丽霞; 王勤; 王传栋; 山东省药学科学院，山东省医用高分子材料重点实验室，济南 250101

Author(s):: ZHU Aichen; LI Junqi; ZHANG Suwen; LIU Yang; YIN Tao; MA Lixia; WANG Qin; WANG Chuandong; Shandong Academy of Pharmaceutical Sciences, Shandong Provincial Key Laboratory of Biomedical Polymers, Jinan 250101, China

Keywords:: Poly(P-dioxanone); Low temperature; Crystallization; Thermal properties; Crystal morphology

摘要:: 利用差示扫描量热法、配带热台的偏光显微镜和X射线衍射研究了聚对二氧环己酮（PPDO）的低温结晶行为。PPDO在不同结晶温度下的DSC曲线表明，PPDO在加热熔融过程中均出现熔融再结晶现象，并且随着结晶温度的升高，熔融再结晶的温度升高及熔限变窄。PPDO在不同结晶温度下的POM照片呈现出清晰的Maltese消光十字和明暗相间的同心圆环，PPDO熔融冷却结晶形成的是球晶。XRD结果显示，随着结晶温度的升高，结晶度增大。

Abstract:: The crystallization behavior of poly(P-dioxanone) (PPDO) at low temperature was researched using differential scanning calorimetry (DSC), polarized optical microscope with hot platform (POM) and X-Ray diffraction (XRD). DSC curves of PPDO at different crystallization temperatures revealed that PPDO began to recrystallize in the heating process before melting, the temperature of melt recrystallization increased and the melting limit narrowed with the increase of crystallization temperature. The POM images of PPDO at different crystallization temperatures showed clear Maltese cross and bands, and PPDO was spherocrystals while cooling from melt. XRD results show that the crystallinity increases with the increase of crystallization temperature.