摘要
将两种不同比表面积和亲-疏水性的纳米二氧化硅(nano-SiO2)用于改性废聚对苯二甲酸乙二醇酯(r-PET),采用熔融共混法制备了r-PET/nano-SiO2纳米复合材料,并对其力学性能、微观形貌、特性黏度、结晶性能和热稳定性进行了研究。结果表明:少量nano-SiO2(HL200或HB630)的加入能提高r-PET的力学性能,当nano-SiO2添加量为0.8 phr时,r-PET/nano-SiO2复合材料的拉伸强度和缺口冲击强度均达到各自体系的最优值。Nano-SiO2的加入还提高了r-PET的特性黏度,其中HB630的效果更佳。另外,nano-SiO2的引入能够提高PET的结晶峰温度,缩小结晶峰半峰宽,加快结晶速率。
Two different kinds of nanosilica（nano-SiO2）,a hydrophilic nano-SiO2（HL200） and a hydrophobic one（HB630）,with different specific surface area were used to modify recycled polyethylene terephthalate（r-PET） and r-PET/nano-SiO2 nanocomposites were prepared by melt blending method.The mechanical properties,microstructure,intrinsic viscosity,crystallinity and thermal stability of the composites were studied.The results show that a small amount of nano-SiO2 can improve the mechanical properties of r-PET.When the content of nano-SiO2（HL200 or HB630） is 0.8 phr,the tensile strength and notched impact strength of the r-PET/nano-SiO2 composite reach the optimal value.Nano-SiO2 can also improve the intrinsic viscosity of r-PET,and the nanosilica HB630 shows the better effect.Moreover,nano-SiO2 can increase the crystallization peak temperature of the r-PET,narrow the crystallization peak half-width and accelerate the rate of crystallization.
出处
《塑料科技》
CAS
北大核心
2014年第10期77-81,共5页
Plastics Science and Technology
基金
省部产学研结合项目(2012B091100502)
