Study On Preparation And Properties Of PVC/Bamboo Powder Composite Foaming Material

In order to prepare lightweight PVC/bamboo powder composite foaming material,the foaming agent used in this paper is AC/ZnO compound foaming agent and plasticizer DOP,and the coupling agent was a composite coupling agent of aluminum and titanium.Through the exploration and Research on the forming mechanism of PVC/bamboo powder composite foaming material,the formula of material processing is optimized.The content of the added bamboo powder,AC/ZnO compound foaming agent,DOP plasticizer and aluminum titanium compound coupling agent is the level factor.The orthogonal test scheme is designed by the apparent density of the final composite material as the test target..The effects of bamboo powder,foaming agent,plasticizer and coupling agent on the apparent density,tensile strength,bending strength,springback performance and water absorption of PVC/bamboo powder composite foam were studied.The conclusions are as follows:?1?With the increase of bamboo powder content,the apparent density of PVC/bamboo powder composite foam material decreases first and then increases,the tensile strength and bending strength increase first and then decrease,and the water absorption performance is continuously increasing.When the content of bamboo powder is 30%,the minimum apparent density of PVC/bamboo powder composite foaming material is0.896 g·cm^-3,the maximum tensile strength is 31.5 MPa,and the maximum bending strength is 36.12 MPa.The density of non foaming PVC/bamboo powder composites increased with the increase of bamboo powder content.The density of foamed materials decreased by 23%,compared with that of non foaming materials.?2?The foaming agent has the greatest influence on the mechanical properties of PVC/bamboo powder composite foaming material.In the process of increasing the content of the foaming agent,the apparent density and the mechanical properties of the PVC/bamboo powder composite foam were decreased first and then increased,only the rebound rate was increased first and then decreased.When the foaming agent content is 15%,the minimum apparent density of PVC/bamboo powder composite foaming material is 0.96 g·cm^-3,the minimum tensile strength is 23.25 MPa,the minimum bending strength is 28.12 MPa and the maximum rebound rate is 91.5%.?3?The effect of plasticizer DOP on the springback performance of PVC/bamboo powder composite foam material is the largest.With the increase of the content of plasticizer DOP,the apparent density of PVC/bamboo powder composite foam material decreases first and then increases,the impact strength is continuously increasing,and the rebound rate and bending strength are increased first and then then decrease.When the content of DOP is 30%,the minimum apparent density of PVC/bamboo powder composite foaming material is 1.042 g·cm^-3,the maximum bending strength is 34.56 MPa and the maximum rebound rate is 87.98%.When the content of DOP is 25%,the impact strength of PVC/bamboo powder composite foam material can reach 8.9 KJ·m^-2.?4?The aluminum titanium composite coupling agent mainly affects the interface compatibility of PVC/bamboo powder composite foam material,that is,the impact on mechanical properties and density.With the increase of coupling agent content,the apparent density of PVC/bamboo powder composite foam material first decreases and then increases,and the resilience,tensile and flexural strength increase first and then decrease.When the content of aluminum titanium composite coupling agent is 2%,the minimum apparent density of PVC/bamboo powder composite foaming material is 0.98 g·cm^-3,the maximum rebound rate is 91.3%,the maximum tensile strength is 29.5 MPa and the maximum bending strength is 36.36 MPa.