摘要
采用高压毛细管流变仪研究了易染色聚酯熔体的流变行为,并将其与聚酯熔体的流变行为进行了对比。结果表明:易染色聚酯熔体属于典型的假塑性非牛顿流体,表现出明显的剪切变稀特性;随着温度的升高,易染色聚酯熔体的表观黏度下降,非牛顿指数逐渐增大,结构黏度指数减小;易染色聚酯熔体的黏流活化能随着剪切速率的增大而减小,即其表观黏度的温度敏感性随着剪切速率的增大而降低;与PET熔体相比,易染色聚酯熔体的表观黏度对温度和剪切速率的依赖性更高,且结构化程度更大。
The rheological behavior of dyeable polyester melt was studied with the capillary rheometer, and compared with the rheologieal behabior of ordinary polyester （PET） melt. The results show that dyeable polyester melt is the typical pseudo plastic and non-Newton fluid. When the temperature increases,the apparent viscosity and structural viscosity index of dyeable polyester melt decline and the non-Newton index increases. With the increase of shear rate, the viseo-flow activation energy of dyeable polyester melt declines,in other words,the temperature sensitixity of apparent viscosity declines with the shear rate increasing. Compared with PET, the apparent viscosity of dyeable structure polyester melt is more sensitive to temperature and shear rate, and the degree of structure is higher.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2015年第7期1-6,共6页
Journal of Textile Research
基金
"十二五"国家科技支撑计划项目(2011BAE05B04)
关键词
易染色聚酯
普通聚酯
熔体
毛细管流变仪
流变性能
dyeable polyester
ordinary polyester
melt
capillary rheometer
rheologieal behavior
