【摘要】 在聚对苯二甲酰对苯二胺(PPTA)纤维纺丝工艺初步成形的基础上,利用均匀设计法建立回归模型.以纤维断裂强度作为质量指标,对PPTA纺丝过程中的喷出速度、拉伸倍数、卷绕速度3个主要工艺参数进行了优化,力图用最少的试验次数确定最佳的工艺条件.通过计算得到回归方程,经过残差分析可知该方程的可靠性较高.利用SUMT外点法寻优,计算得到PPTA纺丝的最佳工艺条件:喷出速度为26.68m/min,拉伸倍数为7.76倍,卷绕速度为208.34m/min,则PPTA纤维的理论断裂强度为35.67cN/dtex.更多还原

【Abstract】 On the basis of spinning process of poly(p-phenylene terephthalamide)(PPTA)fiber,a regression model was established to optimize the technics using uniform design.The break tenacity was regarded as a quality index,and three main parameters:extrusion speed,draw ratio,and winding speed,in the spinning process were optimized.The best spinning condition was confirmed with the least experiment times.The regression equation was found,and its reliability was rather high by residual error analysis.Calculated with SUMT external point method,the best spinning conditions were that extrusion speed was 26.68m/min,draw ratio was 7.76,winding speed was 208.34m/min,and then the break tenacity caculated was 35.67 cN/dtex.更多还原