摘要
选用回收再利用聚酯中的瓶片和泡料为样品,利用旋转流变仪研究两种样品在稳态与动态两种模式下的流变性能。结果表明:在稳态模式下,随着剪切速率的不断增加,两种样品的表观黏度均呈下降趋势,为切力变稀流体,采用幂律模型拟合得到两种样品的非牛顿指数分别为0.71与0.85,拟合相关系数R2均接近于1。在动态模式下,瓶片对恒定持续性高温更为敏感,复数黏度下降更为明显;随着温度上升,两种样品的储能模量、损耗模量与复数黏度均逐渐降低,且温度对具有高特性黏度的瓶片的影响明显大于对具有低特性黏度的泡料的;随着角速度的增加,两种样品的复数黏度均从急剧下降转变为缓慢下降,损耗因子表现为先上升至最大值后下降,值均大于1。
The bottle flakes and foam materials of recycled polyester were selected as samples,their rheolog⁃ical properties under steady-state and dynamic modes were studied by rotating rheometer.The results show that in the steady-state mode,the apparent viscosity of the two samples decreases with the increase of shear rate,the two samples are shear thinning fluids.The non-Newtonian indices of the two samples fitted by the power-law model are 0.71 and 0.85,respectively,and the fitting correlation coefficients R2 are close to 1.In the dynamic mode,the bottle flakes are more sensitive to constant continuous high temperature,and the complex viscosity decreases more obviously.With the increase of temperature,the storage modulus,loss modulus and complex viscosity of the two samples decrease gradually,and the effect of temperature on the bottle flakes with high intrinsic viscosity is significantly greater than that of the foam materials with low in⁃trinsic viscosity.With the increase of angular velocity,the complex viscosity of the two samples changes from a sharp decline to a slow decline;the loss factor increases first to the maximum value and then decreas⁃es,and the values are all greater than 1,indicating that the polymer melt is in a situation where the viscosity response is dominant.
作者
邢喜全
肖汪洋
姚玉元
吕维扬
王秀华
何肖
XING Xi-quan;XIAO Wang-yang;YAO Yu-yuan;LYU Wei-yang;WANG Xiu-hua;HE Xiao(Yuyao Dafa Chemical Fiber Co.,Ltd.,Ningbo 315400,Zhejiang,China;National Engineering Lab for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,Zhejiang,China)
出处
《合成纤维》
2024年第1期1-6,共6页
Synthetic Fiber in China
基金
科技创新2025重大专项(宁波市重大科技任务攻关项目)(2022Z156)。
关键词
回收再利用
废弃聚酯
特性黏度
流变性能
recycling
waste polyester
intrinsic viscosity
rheological property
