基于均匀设计的UHMWPE纤维与十氢萘的分离过程研究

Research on UHMWPE fiber by uniform design and separation of decalin

采用均匀设计实验探讨了干法纺丝制备超高分子质量聚乙烯(UHMWPE)纤维过程中溶剂脱除时不同工艺参数对十氢萘去除率的影响,通过DPS分析软件对其结果进行二次多项式回归分析。十氢萘去除率的回归模型相关系数为0.9998,回归模型能够较好地拟合实验过程。优化后的工艺参数为:侧吹风风量为40m^3/h,侧吹风温度为140℃,甬道风温度为130℃,一级牵伸频率为36Hz,十氢萘去除率的模拟值为90.88%,实测得到十氢萘去除率为88.62%,与模型预测值有了较好的对应,回归模型有较好的拟合性和稳定性。对挥发速率方程进行推导,建立影响因子与工艺参数的相关性,对纤维与溶剂的分离过程进行定性的说明。

Effect of different experimental parameters on decalin removal rate in preparing ultra-high molecular weight polyethylene（UHMWPE）fibers via dry spinning were studied based on uniform design.Results were analyzed by quadratic polynomial stepwise regression on DPS.The correlation coefficient of model was 0.9998.The optimized parameters were as follows：40m^3/h of cross air at 140℃,tunnel air at 130℃ and level 1draft at 36 Hz.Compared simulation decailin removal rate of 90.88% and actual rate of 88.62%,regression model can fit the experiment well.Correlations of influence factors and experimental parameters were established and separation process of fiber and solvent was described qualitatively based on the derived volatilization rate equation.