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通过比较不同的标准及检测方法,采用JISK7237—1995标准对聚脲用各原材料、聚脲、聚氨酯、聚氨酯(脲)的氨基组分的胺值分别进行检测,并与相应A组分的NCO检测值关联。通过与高铁用聚脲、聚氨酯(脲)胺值检测指标对比,判定该高铁用材料是(纯)聚脲还是聚氨酯(脲)。
By comparing different standards and testing methods, the amine values of the amino components of polyurea using polyurea, polyurea, polyurethane and polyurethane (Urea) were respectively tested according to JIS K7237-1995 standard, and compared with the NCO of the corresponding A component Value associated. By comparing with the detection index of polyurea and polyurethane (urea) for high-speed railway, it is determined whether the high-speed rail material is (pure) polyurea or polyurethane (urea).