Preparation and mechanical properties of ATBC toughened PLA materials
In order to improve the impact property of polylactic acid(PLA),acetyl tributyl citrate(ATBC)was used as a tough-ening agent to prepare ATBC toughened PLA materials(PLA/ATBC)with high impact strength through blending method.Fourier transform infrared spectroscopy were employed to characterize the structure of the PLA/ATBC.Additionally,the influences of ATBC content on the rheological,tensile,and impact properties of PLA were investigated and compared with the mechanical proper-ties of toughening agent functionalized polyester elastomer(BP-2)modified PLA materials(PLA/BP-2).The results show that ATBC decreases the tensile properties of the material,but an appropriate amount of ATBC can improve the processing and impact properties of the material.When the mass fraction of ATBC is 2.5%,the equilibrium torque of the material is the lowest.When the mass fraction of ATBC reaches 5%,the impact strength of PLA peaked at 30.1 kJ/m2,which increases by 87%compared to pure PLA,but continuing to increase the ATBC content can lead to a rapid decrease in the impact strength of the material.Furthermore,the mechanical properties of PLA/ATBC are significantly higher than those of PLA/BP-2 blend with the same toughening agent mass fraction of 5%,the impact strength of PLA/ATBC increases by 79.2%compared to PLA/BP-2.The above results provide reference for the development of PLA materials with high impact property.
万方数据
维普
