PTT/PE共混体系结晶动力学及结晶形态研究  

Study on the Non-isothermal Crystallization Kinetics and Crystal Morphology of PTT/PE Blends

作　　者：任曙霞[1] 罗卫[1] 苏旺飞[1] 黄象安[1,2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维》2010年第2期26-30,共5页Synthetic Fiber in China

摘　　要：采用差示扫描量热法(DSC)研究了聚对苯二甲酸丙二醇酯/聚乙烯(PTT/PE)共混体系的非等温结晶动力学,通过热台偏光显微镜(POM)对共混物在等温条件下的结晶形态进行了研究。结果发现:PTT/PE共混体系各样品的结晶峰温度随着冷却速率的提高而下降,而半结晶时间t1/2随着冷却速率的提高而提高;结晶动力学常数Zc随着冷却速率的提高而下降,表明共混体系的结晶速率随着冷却速率的提高而降低;在POM观察的时间范围内各样品的球晶尺寸随着时间的延长而增大,PTT/PE(30/70)共混体系在190℃结晶时,球晶尺寸较大,即球晶生长较快。The non- isothermal crystallization kinetics of PTT/PE blends were studied by using differential scanning calorimetry （DSC） and the crystal morphologies of the blends were studied at isothermal crystallization using polarizing microscope with hot stage （POM）. The result showed that the value of the temperature corresponding to the exothermic peak decreased while the half-time of crystallization （t1/2） increased with the cooling rate increasing. The kinetic constant of crystallization （Zc） decreased with the cooling rate increasing. It was also found that the crystallization rate of the blends decreased with the cooling rate increasing. The dimension of spherulites increased with time extended in the POM observations. Compared among different crystallization temperatures, the largest dimension of spherulites was observed at 190 ℃ for PTT/PE （30/70）.

关 键 词：聚对苯二甲酸丙二醇酯 聚乙烯 共混 非等温结晶动力学 结晶形态 

分 类 号：TQ340.1[化学工程—化纤工业]