以聚氨酯(PU)纤维和聚酯(PET)纤维为原料,根据弹性非织造材料的性能要求,以PET纤维为刚性支撑成分,PU纤维为弹性和粘结成分,经梳理成网、热压成型得到PET/PU弹性非织造材料,对材料的性能进行了测试。结果表明:采用梳理成网法,在热压温度...以聚氨酯(PU)纤维和聚酯(PET)纤维为原料,根据弹性非织造材料的性能要求,以PET纤维为刚性支撑成分,PU纤维为弹性和粘结成分,经梳理成网、热压成型得到PET/PU弹性非织造材料,对材料的性能进行了测试。结果表明:采用梳理成网法,在热压温度为160℃,热压压力为30 k Pa,热压时间为1 min时,材料的透气性能优异,拒水效果好;当PU纤维质量分数为15%时,材料均匀性、回弹性及力学性能最佳,其弹性回复率达100%。展开更多
Poly(lactic acid)(PLA) was blended with various polycaprolactone(PCL) components through the melt blending process for toughening modification on PLA.The tensile testing,scanning electron microscope(SEM) and different...Poly(lactic acid)(PLA) was blended with various polycaprolactone(PCL) components through the melt blending process for toughening modification on PLA.The tensile testing,scanning electron microscope(SEM) and differential scanning calorimetry(DSC) were implemented to analyze mechanical properties,disperse morphology,thermal properties and compatibility of composite materials,respectively.The shape memory performance of PCL/PLA composites was also investigated.The results showed that the elongation at break of composites increased by 10 and 15 times than pure PLA with adding 20% and30% by weight of PCL,and the yield strength retention rates were77% and 67%,respectively.The SEM showed that PCL/PLA composite was a semi-compatible system.PCL particles could be evenly dispersed in the PLA at 20% or 30% by weight PCL content,and the particle size was very small.DSC results showed a decline in Tg and Tm whereas an increase in Td with the addition of PCL.The addition of PCL could improve the shape memory performance of PLA.The shape memory performance was enhanced with the PCL content increase,but decreased with the tensile strain increase.The best temperature for shape recovery was between 60 and 70 ℃,and the shape memory performance remained 80% after 5 times recycle.展开更多
文摘以聚氨酯(PU)纤维和聚酯(PET)纤维为原料,根据弹性非织造材料的性能要求,以PET纤维为刚性支撑成分,PU纤维为弹性和粘结成分,经梳理成网、热压成型得到PET/PU弹性非织造材料,对材料的性能进行了测试。结果表明:采用梳理成网法,在热压温度为160℃,热压压力为30 k Pa,热压时间为1 min时,材料的透气性能优异,拒水效果好;当PU纤维质量分数为15%时,材料均匀性、回弹性及力学性能最佳,其弹性回复率达100%。
基金National Natural Science Foundation of China(No.51303085)Prospective Joint Research Project of Jiangsu Province,China(No.BY2015047-14)
文摘Poly(lactic acid)(PLA) was blended with various polycaprolactone(PCL) components through the melt blending process for toughening modification on PLA.The tensile testing,scanning electron microscope(SEM) and differential scanning calorimetry(DSC) were implemented to analyze mechanical properties,disperse morphology,thermal properties and compatibility of composite materials,respectively.The shape memory performance of PCL/PLA composites was also investigated.The results showed that the elongation at break of composites increased by 10 and 15 times than pure PLA with adding 20% and30% by weight of PCL,and the yield strength retention rates were77% and 67%,respectively.The SEM showed that PCL/PLA composite was a semi-compatible system.PCL particles could be evenly dispersed in the PLA at 20% or 30% by weight PCL content,and the particle size was very small.DSC results showed a decline in Tg and Tm whereas an increase in Td with the addition of PCL.The addition of PCL could improve the shape memory performance of PLA.The shape memory performance was enhanced with the PCL content increase,but decreased with the tensile strain increase.The best temperature for shape recovery was between 60 and 70 ℃,and the shape memory performance remained 80% after 5 times recycle.
