连续反应釜中间位芳纶制备过程的数值模拟OA

Poly(m-phenylene isophthalamide),as a special fiber material,has broad applications in many fields,such as clothing,transportation,sport,and electronics.This work established a model for poly(m-phenylene isophthalamide)polycondensation reaction process using computational fluid dynamics(CFD)methods coupling with polymerization reaction kinetics.The numerical investigation systematically examined the effects of key process parameters on polymer molecular weight,along with spatial distributions of reactant concentration,molecular weight distribution,temperature,and viscosity.The results indicated that increasing the mean residence time and enhancing the solvent's acid absorption capacity were beneficial for rapidly increasing the molecular weight of the polymer.As mean residence time increased,the aggregation phenomenon of the reactant at the bottom of the stirrer reduced;the polymer's molecular weight distribution concentrated towards higher molecular weight,the temperature gradient decreased,and the viscosity changed significantly.The established polycondensation model for the continuous reactor provided theoretical guidance for the continuous production of poly(m-phenylene isophthalamide)and aids in the optimization of process parameters and reactor geometric structure.