Research On 3D Printing Of Thermoplastic Polyurethane Elastomers

Pneumatic tires made of traditional rubber materials have been widely used because of their advantages of fast speed,good shock absorption performance,resistance to wet skid,and light weight.However,pneumatic tires also have potential safety hazards such as poor puncture resistance and explosive tires.Therefore,the development and utilization of non-pneumatic tires has gradually become one of the hot spots in the tire field.In this paper,thermoplastic polyurethane elastomer materials are used to try to prepare non-pneumatic tires by fused deposition modeling(FDM)3D printing technology,and perform performance research and process improvement on them.The advantage of this idea is that it can achieve rapid trial production of non-pneumatic tires of various structures without the need to manufacture molds.In this thesis,the properties of thermoplastic polyurethane elastomer materials were studied using methods such as tensile test,TGA test,DSC test,TMA test,variable temperature tensile test,and other biaxial tensile tests.Based on the performance comparison of various aspects,the tensile strength of LANXESS-PC930 reaches 45.1 MPa,the softening temperature reaches 180?,the glass transition temperature Tg reaches-46.4?,meanwhile,it has the best bending resistance,and is represented by the hysteresis area during the tensile recovery energy consumption is minimal.In addition,with increasing temperature,the storage modulus E'and tensile strength of LANXESS-PC930 are relatively optimal.Therefore,the comprehensive performance of LANXESS-PC930 is more excellent.Using JGRW-wire to 3D print standard tensile splines through FDM technology,and by comparing the tensile strength and cross-sectional morphology of 3D printed molding splines,the relationship between FDM technology 3D printing process and the performance of molded products was studied.Under certain conditions,keeping other 3D printing process parameters unchanged,the 3D printing temperature is reduced,the 3D printing filling rate is increased,and the performance of 3D printed molded products becomes better.At the same time,on the basis of this,non-pneumatic tires were successfully prepared by FDM printing technology using JGRW-wire,and the non-pneumatic tires molded by asynchronous 3D printing were subjected to structural optimization and performance tests.The test results show that the actual three-dimensional stiffness of the 3D printed non-pneumatic tire is consistent with the three-dimensional stiffness results obtained by 50%simulation using JGRW-wire performance.