【摘要】 采用自制的毛细管流变仪研究了聚对苯二甲酸丙二醇酯 ( PTT)的流变性能。结果表明 :PTT熔体属切力变稀型流体 ,随温度升高或相对分子质量降低 ,其非牛顿指数增大 ,熔体表观粘度对温度的敏感性较大。在 PTT生产中 ,应严格控制纺丝温度 ,通过温度来调节熔体粘度。更多还原

【Abstract】 The rheological property of polytrimethylene terephthalate(PTT) was studied with capillary rheometer. The result shows that PTT is pseudoplastic fluid whose non\|Newtonian index increases with raising temperature or decreasing relative molecular mass, and the melt’s apparent viscosity is extremely sensitive to temperature. The spinning temperature should be well controlled to control melt viscosity during PTT production.更多还原