Ключевые слова:
Polyurethane, Isocyanates, Aromatic compounds, Aromatic hydrocarbons, Raw materials, Acidimetry, Acidity, pH measurement, Plastics, Polymers, Chemical analysis and testing, Determination of content, Interferences (chemical), Volumetric analysis, Test specimens, Specimen preparation, Control samples, Test equipment, Testing conditions, Sampling methods, Precision, Reproducibility