聚氨酯改性不饱和聚酯树脂的反应动力学

Kinetics of the Curing of Polyurethane Modified Unsaturated Polyester Resin

摘要: 通过差示扫描量热法（DSC）和傅里叶红外光谱（FT-IR）分析，探讨了聚氨酯改性不饱和聚酯树脂（UPR）体系反应特征及固化反应动力学。结果表明：体系中聚氨酯网络的形成远快于UPR网络的形成。UPR和聚氨酯改性UPR体系的表观活化能分别为58.0 kJ/mol和64.8 kJ/mol，改性后体系的活化能并无较大变化；反应的级数分别为0.90和0.91。

Abstract: The curing characteristic and kinetics analysis of polyurethane modified unsatura-ted polyester are studied by DSC and FT-IR. The network of polyurethane is formed much faster than that of unsaturated polyester. The apparent activation energy of UPR is 58.0 kJ/mol, while that of polyurethane modified UPR is 64.8 kJ/mol. There is no significant difference between the two systems. The reaction order of UPR is 0.90, while that of polyurethane modified UPR is 0.91.