Fluid Kinetic Energy Nucleation Theory underComplex Flow Field in Plastic Foaming

There are three basic processes in plastic foaming,which are bubble nucleation,growing up and solidify.But the bubble nucleation is the key process.The disadvantages of classical theory of bubble nucleation in motion polymer melt have been pointed out through analyzing.The bubble nucleation process was described by using energy for motion and complex flow field polymer melt respectively.The Fluid Kinetic Energy Nucleation Theory under complex flow field in plastic foaming was founded,which could describe the foaming process roundly and exactly,and instruct the foaming process furthermore.Finally,the development way of bubble nucleation is presented.