Parameters Relevant to Bubble Detachment when Gas-injecting into Polymer Melt Flow Field  

作　　者：陈再良 

机构地区：[1]College of Mechanical and Electrical Engineering, Soochow University, Suz hou 215021, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2005年第1期68-71,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Nature Science Foundation of China(No.19632004,No.10172074); the Research Foundation for the Doctor al Program of Higher Education of China (No.98056113); Guang dong Province Nature Science Foundation ( No. 980573, No.0401154)

摘　　要：The bubble deformation processes were reported when gas was injected into polyme r melt flow field in another paper, the experiments showed that the deformation was severely affected by the volume of the bubble, and in turn, for the different bubbles, several different deformation processes were presented d uring their movement along the flow channel. In addition, we could find that the magnitude of the bubble volume was dependent upon the pressure difference of th e gas injection pressure and the melt pressure. In this paper, more experimental conditions were changed to investigate the parameters relevant to the detachmen t of bubbles from the injection nozzle. The experimental results show that the p ressure difference, the melt flow velocity as well as the melt pressure were all critical for the parameters, such as the bubble detachment time, the maximum bu bble diameters and the magnitude of the bubble volume. The morphology changes of bubble were very large when the flow field was abruptly changed, and the situat ions were more complicated.The bubble deformation processes were reported when gas was injected into polyme r melt flow field in another paper, the experiments showed that the deformation was severely affected by the volume of the bubble, and in turn, for the different bubbles, several different deformation processes were presented d uring their movement along the flow channel. In addition, we could find that the magnitude of the bubble volume was dependent upon the pressure difference of th e gas injection pressure and the melt pressure. In this paper, more experimental conditions were changed to investigate the parameters relevant to the detachmen t of bubbles from the injection nozzle. The experimental results show that the p ressure difference, the melt flow velocity as well as the melt pressure were all critical for the parameters, such as the bubble detachment time, the maximum bu bble diameters and the magnitude of the bubble volume. The morphology changes of bubble were very large when the flow field was abruptly changed, and the situat ions were more complicated.

关 键 词：BUBBLE MORPHOLOGY detachment time geometry parameters flow field 

分 类 号：TB324[一般工业技术—材料科学与工程]