FTIR Study of Polyurethane-Urea Model Hard Segments Based on MDI and HMDI
基于MDI和HMDI聚氨酯脲模型硬段的红外光谱研究
Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer , in place of TDI .
六亚甲基二异氰酸酯（HMDI）可用在预聚物中代替甲苯二异氰酸酯〔tdi〕。
HMDIHMDIHMDI