Interface deformation and the parameters relevant to bubble detachment when gas is injected into polymer melt flow field

In this paper, gas will be injected inot a polymer melt flow field through a nozzle and the bubble deformation process will be investigated. By changing the gas injection pressure, bubbles with different voluem, surface area, as well as different detaching times will be obtained. Whent eh bubbles move twoard the die exit, the bubble interface then will be affected by the flow field, and thus its deformation process can be characterized. In addition, the parameters relevant to the bubble detachment, such as the detachment time ranging from the bubble emergence to its detachment, the magnitude of the bubble volume or its maximum diameter were investigated by changing all related experimental conditions.