Studying On Properties And Morphology Of Polymer Ameliorated By Fiber-glass Under Low-frequency Vibration Field

In this dissertation, we talk about the low-frequency vibration technology that be applied to injection molding by injecting melt of PP ABS etc polymers ameliorated by fiber-glass injecting melt of PP ABS etc polymers ameliorated by fiber-glass.We can learn from this paper that how the frequency of vibration the pressure of vibration and temperature affect the mixture through the variety of vibration frequency and vibration pressure under different processing temperature.In this text, we have tested the properties of tensile-strength, impact-strength, SEM, DSC etc. The vibration field are applied to both the injection and the pressure maintaining of molding, through these methods, we can conclude as follows:1) The vibration field can help to improve the tensile-strength of products: For GFRPP, it can be improved to about 12% in the direction paralleling with the flow of melt. In the same way, it can be improved to about 12.4% in the vertical direction of flow of melt. For GFABS, the value:8.16% and 16.23%.2) The Impact-strength of sample can be improved under vibration field: For GFRPP and GFRABS, the values improved by vibration field are 17.68% 28.76% and 10.1% 16.62% in the parallel direction and vertical direction.3) The tensile-strength and impact-strength improved under vibration field in the vertical direction are better in the parallel direction; The reasons are both thatvibration field builds up the expanding flow and the fountained flow in the injection and that the orientation of fiber-glass in the products should be polished up in the vertical direction in the pressure maintaining. 4) There is a optimal parameter(frequency, pressure and temperature) for the improvement of tensile-strength and impact-strength. With the frequency and pressure of vibration building up, the tensile-strength and the impact-strength firstly have a fluctuant increase then tend to be gentle. In this course of variety, there is an max value because of reciprocity of high polymer and the vibration field that the former have the properties of relaxation and creep deformation.