摘要
Abstract
The reaction kinetics of glycidyl azide polymer (GAP)with polyisocyanate (N100)was studied by the FT-IR method.Using triphenyl bismuth(TPB)and di-n-butyltin dilaurate (T12)as catalysts,the reaction mecha-nism function and activation energies of the two systems at 60,70,80 and 90℃ were obtained.The results show that the curing reaction of GAP/N100 system is determined as first order reaction.When the content of TPB and T12 is 0.015%,respectively,the whole curing reaction process using TPB as catalyst obeys the first-order kinetic law,the system using T12 as catalyst obeys the first-order kinetic law and the reaction mechanism function is g(α)=-ln(1 -α)when the degree of conversation is less than 80%,while the system obeys three-dimensional (spheri-cal symmetric)diffusion and the reaction mechanism function is g(α)=[1 -(1-α)1/3 ]2 when the degree of conver-sation is over 80%.The curing reaction time of GAP/N100 using T12 as catalyst is much less than that of GAP/N100 using TPB as catalyst.关键词
物理化学/FT-IR 光谱/固化反应动力学/GAP/N100/TPB/T12Key words
physical chemistry/FT-IR spectrum/curing reaction kinetics/glycidyl azide polymer/N100/TPB/T12分类
军事科技
