超声改性无水硫酸钙晶须对聚丙烯等温结晶行为的影响  

Study on the Isothermal Crystallization Behavior of PP Composites Filled with Ultrasound Treated Anhydrous Calcium Sulfate Whisker

作　　者：刁梦娜[1] 杨成志[2] 邱学剑 秦军[1] 

机构地区：[1]贵州大学喀斯特环境与地质灾害防治教育部重点实验室,贵州贵阳550003 [2]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《塑料科技》2014年第8期29-32,共4页Plastics Science and Technology

基　　金：国家自然科学基金(21266005)

摘　　要：用超声法对无水硫酸钙晶须(ACSW)进行改性,并利用差示扫描量热法(DSC)研究了聚丙烯(PP)、PP/ACSW和PP/超声改性无水硫酸钙晶须(UACSW)复合材料的等温结晶行为;用Avrami方程全面分析了复合材料的等温结晶过程,并计算出其结晶动力学参数。结果表明:超声改性后的PP/UACSW复合材料的结晶时间缩短,结晶速率显著提高,证明UACSW能促进PP材料的结晶,并在PP结晶过程中起到异相成核作用。The anhydrous calcium sulfate whisker（ACSW） were modified via ultrasonic method, and the isothermal crystallization behavior of polypropylene（PP）, polypropylene/anhydrous calcium sulfate whisker（PP/ACSW） and polypropylene/ultrasonic treated anhydrous calcium sulfate whisker（PP/UACSW） were investigated by using differential scanning calorimeter（DSC）. Avrami equation was used to analyze isothermal crystallization, and the kinetic parameters of crystallization were calculated. The results show that the crystallization time of PP/UACSW composite reduces, the crystallization rate increases after being ultrasonic modified PP/UACSW composites. It is proved that UACSW can promote the crystallization of PP, and UACSW acts as heterogeneous nucleation in the crystallization process of PP.

关 键 词：聚丙烯 无水硫酸钙晶须 超声改性 复合材料 等温结晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]