Preparation and Properties of Irradiated Cross-linked 3D Printed Polyamide 12 with Shape Memory Properties
3D printing of smart materials is known as 4D printing,which has great application prospects in aerospace,biomedical and other fields.In this paper,nylon 12(PA12)was blended with triallyl isocyanurate(TAIC)for the fused deposition(FDM)printing,and the shape memory properties of the printed specimens were obtained after the printed specimen was cross-linked by electron beam irradiation.Then the effects of the printing parameters and irradiation dose on the mechanical properties,shape memory properties,and thermal properties of the printed specimens were investigated.The results show that the optimum printing temperature is 225 ℃,the printing speed is 40 mm/s,and the printing flow rate is 110％.Compared with the unirradiated printed specimens,the tensile strength,bending strength and impact strength of the irradiated cross-linked printed specimens increase,the Vicat softening temperature increases and the elongation at break decreases.The gel content(84.32％)of the irradiated printed specimen reaches the maximum at an irradiation dose of 100 kGy,and the shape recovery rate(99.56％)of the specimen also reaches maximum.The irradiated cross-linked printed specimen still has 99.50％shape fixation rate and 96.28％shape recovery rate after 10 cycles,indicating that the irradiated cross-linked 3D printed PA12 specimen has excellent shape memory properties.
3D PrintingPolyamide 12Fused DepositionElectron Beam IrradiationShape Memory Property
万方数据
维普
