1.Chemical Engineering United National Key Laboratory, School of Chemical Engineering and Bioengineering, Zhejiang University, Hangzhou 310058, China;
2.Zhejiang University Quzhou Research Institute, Quzhou 324000, China
Abstract：The reaction between hydroxyl groups and isocyanates is one of the most important chemical reactions in the synthesis of polyurethane. A fluorescence labeling method was established to characterize the reaction kinetics of hydroxyl and isocyanate. Based on this method, this work explored the effects of aromatic alcohol molecular structure and polymer chain composition on the reaction kinetics of hydroxyl and isocyanate polymers. Research results indicated that due to the combined effects of inductive and steric hindrance, the relative rates of reaction between aromatic alcohols with different substituents and isocyanate polymers from large to small were as follows: naphthalene α-position, phenylmethyl, naphthalene β-position, phenylethyl, phenylpropyl. Additionally, the introduction of benzene rings into polymer chains containing isocyanate functional groups decreased the reaction rate with small-molecule alcohols due to the conjugation effect of multiple benzene rings.
WU Jie,ZHANG Cailiang,GU Xuping et al. Kinetic Study on the Reaction Between Aromatic Alcohols and Polymers Containing Isocyanates[J]. Chemical Reaction Engineering and Technology, 2024, 40(5): 411-417.
