Development And Application Of A Mixer Dominated By Biaxial Extensional Deformations For Polymer Based Thermal Conductive Composites

Filled thermally conductive polymer composites are widely used in industry and daily life.However,their use range are limited by their low thermal conductivity.One of the solutions to improve the thermal conductivity is to develop new processing equipment and processing technology,which can reduce the interface thermal resistance.In my work,a mixer dominated by biaxial extensional deformations has been developed.Based on this mixer,effects of different process parameters and formula on the properties of the composites were experimentally studied for higher thermal conductivity.Research productions have theoretical significance and engineering application value.In this work,a new vane mixer dominated by biaxial extensional deformations has been developed.The influences of structural parameters and process parameters on tensile rate and mixer are analyzed through building mathematical and physical models.The structure and working principle of the feeding unit and the mixing unit are described in detail.The main structural parameters of stator are obtained by genetic algorithm.In addition,checking the strength of the vanes through simulation by Abaqus.Blending HDPE/GR composites by the new mixer and the traditional mixer under same process parameters respectively.Analysis of the mixing effect of the two different equipment.The results indicate that the blends prepared by the new technology and the device have higher degree of GR stripping and better dispersibility.Means better tensile strength and higher thermal conductivity from a macro perspective.A melt blending method under synergy of biaxial extensional deformation and ISBS is reported.Effects of different process parameters on the properties of the composites were experimentally studied.Within our research scope,the thermal conductivity of composites reach performance spikes when GR content is 10 wt.%,AC content is 0.4 wt.% and mixing time is 6 minutes.The tensile strength of the composites increases with increasing rotor speed.In conclusion,the results show that the new mixer dominated by biaxial extensional deformations can improve blending effect of polymer-based composites.The research provides new technology and equipment for preparing polymer-based thermal composites.The relevant research results will promote the extensional deformation application to the polymer material forming theory and accelerate the development of melt blending equipment dominated by extensional deformation.