PTFE/SGM复合材料非等温结晶动力学  

Non-Isothermal Crystallizaion Kinetics of PTFE/SGM Composites

作　　者：王志超[1] 寇开昌[1] 毕辉[1] 晁敏[1] 赵春玲[1] 

机构地区：[1]西北工业大学理学院,陕西西安710072

出　　处：《高分子材料科学与工程》2010年第2期114-117,共4页Polymer Materials Science & Engineering

摘　　要：通过冷压烧结工艺制备了聚四氟乙烯/实心玻璃微珠(PTFE/SGM)复合材料。采用差示扫描量热法(DSC)研究了PTFE/SGM复合材料的非等温结晶行为,并利用Jeziorny模型对所得DSC数据进行处理。结果表明:Jeziorny模型处理PTFE/SGM复合材料的非等温结晶动力学过程是合理可行的;随着冷却速率的增加,结晶峰向低温方向移动,结晶温度范围增大,结晶度下降;SGM有一定的成核作用,提高了PTFE的结晶峰温和结晶速率,降低了结晶活化能,使PTFE更易结晶。The non-isotherrnal crystallizaion behavior of polytetrafluoroethylene/solid glass microsphere （PTFE/ SGM） composites was studied by differential scanning calorimetry （DSC）, and the Jeziorny equation was used to analyze the nonqsothermal crystallization kinetics of PTFE/SGM composites. The results show that the non- isothermal crystallization kinetics of PTFE/SGM comtxxsites can be analyzed ideally with the Jeziorny equation. As the cooling rate increases, peak temperature shifts to a lower tempe^ture and crystallinity temperature scale becomes wider, and crystallinity drops. The addition of SGM increases crystallinity temperature and the crystallization rate of PTFE, and decreases the activation energy of crystallization.

关 键 词：聚四氟乙烯/实心玻璃微珠 复合材料 差示扫描量热法 非等温结晶动力学 

分 类 号：O631.13[理学—高分子化学]