Effect of extrusion blowing process on microstructure and properties of PBAT/PLA blend
The in-situ fibrillation films based on poly(adipic acid/butylene terephthalate)(PBAT)/poly(lactic acid)(PLA)blends were prepared by extrusion blowing through adjusting the extrusion process conditions such as die temper-ature and traction speed.The results indicated that PLA tended to form fibers in PBAT/PLA blend system with an in-crease in the traction speed at lower die temperature.The formed fibers tended to refine with an increase at first and then a decrease in the crystallinity.The longitudinal tensile strength and tensile modulus of in-situ fiber formed films also in-creased at first and then tended to decrease.The effect of PLA in-situ fibrillation was the most obvious in the blend at a die temperature of 150℃and a traction speed of 5.0 m/min.Meantime,the longitudinal tensile strength and modulus of the films reached 40.0 and 723.9 MPa,respectively.Their tensile strength was 20%higher than that of pure PBAT,whereas their tensile modulus was much higher than that of pure PBAT.
国家科技期刊平台
NSTL
万方数据
维普
