聚酰胺(PA6)液相增粘反应技术的研究与开发

Research and Development of Liquid Phase Viscosification Reaction Technology for Polyamide(PA6)

聚酰胺(PA6)作为重要的工程塑料之一,由于具有拉伸强度高、弹性模量大、耐磨损、自润滑和耐高温等特性,因此在汽车工业、电子行业、机械设备、海洋工程等行业得到广泛应用。本文主要针对聚酰胺(PA6)通过水解开环及固相增粘技术工艺存在反应效率低,工艺流程长,能耗高、分子量分布不均匀等缺点,通过PA6液相增粘反应技术小试试验研究,研究不同温度、停留时间及真空度下等条件下的增粘效果,其主要流程是缩聚反应完成之后的熔融物料直接进入液相增粘反应器中,通过双轴同向差速叶片连续搅拌不断的进行表面更新,同时低聚物、溶剂等小分子在更新表面溢出并被外部负压系统带走,完成增粘反应。聚酰胺(PA6)液相增粘反应技能耗显著降低,产品质量稳定,产品综合竞争力显著提高。

As one of the important engineering plastics,polyamide(PA6)is widely used in the automotive industry,electronics industry,mechanical equipment,Marine engineering and other industries because of its high tensile strength,large elastic modulus,wear resistance,self-lubrication and high temperature resistance.The shortcomings of polyamide(PA6)unwinding by water and solid phase viscosification technology,such as low reaction efficiency,long process flow,high energy consumption and uneven molecular weight distribution,was focused on.Through the PA6 liquid phase viscousing reaction technology pilot study,the viscousing effect under different temperature,residence time and vacuum conditions was studied.The main process was that the molten material after the condensation polymerization reaction was directly entered into the liquid phase viscousing reactor,and the surface was continuously updated through continuous stirring of biaxial homogeneity differential blades.At the same time,small molecules such as oligomers and solvents overflow on the renew surface and were carried away by the external negative pressure system to complete the viscosification reaction.Polyamide(PA6)liquid phase viscosification reaction skill consumption decreased significantly,product quality was stable,and product comprehensive competitiveness increased significantly.