木质素模型化合物胺基多元醇交联反应及其动力学研究

摘要

将愈创木酚胺基多元醇、香草醛胺基多元醇分别以丁酮为溶剂配成固含量30％的溶液,与MDI-50按—NCO与—OH物质的量比1∶1混合均匀,采用介电分析(DEA)法研究两种胺基多元醇与MDI-50室温交联反应特性,同时采用红外光谱(FT-IR)法进一步研究其交联反应动力学特征,得到两种胺基多元醇的交联反应动力学方程.研究结果表明,木质素模型化合物愈创木酚胺基多元醇、香草醛胺基多元醇与异氰酸酯MDI-50的交联反应活性相近,均遵循n级反应动力学规律.%The guaiacol and vanillin lignin model compounds with aminated polyols were dissolved by butanone to prepare the solution with solid content 30 % , and then mixed with MDI-50 as the molar ratio of -NCO to -OH is 1:1. The characterization of crosslinking reaction of these two aminated polyols with MDI-50 at ambient temperature was investigated by DEA, and the crosslinking reaction kinetics was investigated by FT-IR in this study. The kinetic equations of these two crosslinking reaction systems were obtained. The results indicated that the crosslinking reactions between these two aminated polyols and MDI-50 were similar in reactivity, and the reactions followed the n-order reaction kinetic model.