General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest
GB/T 36526-2018
Scope
This standard specifies the nitrogen content, ash content, moisture, wetting agent, viscosity, light transmittance, whiteness, chroma, acidity, stability, flash point, and solubility of nitrocellulose for industrial use (hereinafter referred to as nitrocellulose). , plasticizer content, turbidity 14 test methods, test principles, reagents and materials, instruments and equipment, test procedures, test result processing, test reports, etc. The 14 test methods in this standard are applicable to the test of nitrocellulose used in coatings, inks, celluloid, daily chemical products, environmental protection products, biomedical products, etc., among which the application characteristics of the following methods are: a) Nitrogen content test The methods include Diwald alloy reduction method, interferometer method, and near-infrared spectroscopy. The Diwald alloy reduction method is an arbitration method, the interferometer method is a commonly used test method in production, and the near-infrared spectroscopy method is a quick and easy test method. ; b) Moisture test methods include Karl Fischer reagent method and near-infrared spectroscopy, Karl Fischer reagent method is an arbitration test method, and near-infrared spectroscopy is a quick and easy test method; c) Wetting agent test methods include The oven method and the halogen lamp method are two methods. The oven method is an arbitration test method, and the halogen lamp method is a quick and simple test method; d) The viscosity test method includes two methods: the falling ball viscosity method and the capillary tube viscosity method. Viscosity lower than 11.5 mPa ? s) nitrocellulose test, capillary viscosity method is suitable for high viscosity (viscosity higher than 11.5 mPa ? s) nitrocellulose test; e) Light transmittance test methods include acetone solvent method and mixed solvent method Two methods, the acetone solvent method is suitable for testing the light transmittance of high viscosity nitrocellulose with low nitrogen content (10.7%~11.3% nitrogen content), and the mixed solvent method is suitable for testing the light transmittance of conventional viscosity nitrocellulose; f) Stability test methods include Beckman-Junk method and Abel method, Beckman-Junk method is 132 ℃ heat resistance test method, Abel is 80 ℃ heat resistance test method.