超声辐照对聚丙烯及聚丙烯/成核剂体系结晶行为的影响  

Influence of Ultrasonic Irradiation on Crystallization of PP and PP/Nucleators

作　　者：曹玉荣[1] 陈英姿[1] 李沁[1] 李惠林[1] 

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室,成都610065

出　　处：《塑料工业》2001年第5期27-28,30,共3页China Plastics Industry

基　　金：国家重点基础研究专项经费资助项目 (G19990 6 480 9)

摘　　要：用静态超声辐照装置 ,研究了超声对聚丙烯及聚丙烯 /成核剂体系结晶行为的影响。通过宽角X射线衍射分析 ,发现超声会引起PP结晶度、晶面间距、晶型及晶粒尺寸等发生变化。而且超声辐照使PP、PP/苯甲酸钠体系出现了 β 晶 ,而PP/滑石粉体系虽无 β晶生成 ,超声却使其α晶的 ( 0 40 )晶面生长有择优性。s The effects of ultrasonic irradiation on crystallization behavior of PP and PP/nucleator were examined by means of static ultrasound device.WAXD analysis demonstrated that ultrasound could change the crystallinity,d spacings,crystal form and crystallite sizes( L hkl )of PP.Ultrasound had different effcts on crystalline structure of PP in different system.Ultrasonic irradiation induced the formation of β crystals in PP and PP/Sodium benzoate,while not in PP/Talc,in which PP presented preferential growth in (040)crystal face of α monoclinic system. L hkl of PP under ultrasonic irradiation was related to nucleators and preferred growth of crystal face.

关 键 词：聚丙烯 成核剂 超声辐照 Β晶 结晶行为 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]