ugg italia Ultra-fine aluminum hydroxide and physi

Ultra-fine aluminum hydroxide and physical indicators of the main purposes

A temperature measurement scale H values of a certain weight determination of ultra-fine aluminum hydroxide, adding color volume of deionized water, the water bath at l00 ℃ significant period of time,[link widoczny dla zalogowanych], measured on the PH meter PH value. DT ugly device with a 1000 balance, PHS a fine 3C, H total, 250 ml beakers, graduated cylinder, heated water, number. Determination of steps: weighing 20.0 g sample taken, into ml beaker, add 80 ml deionized water, £ Stir glass rod, into the water bath pot, covered with sheet pan, 100 ℃ under the insulation 2 hours, remove the cold room temperature. If the water must be deionized water evaporation E at the original scale of 100 ml. Finally, PHS Hitodo density meter to measure the PH PH value. : Determination of surface area determination of the index based on physical adsorption principle, I single continuous flow gas chromatography, by measuring the test! Temperature of liquid nitrogen gas adsorption on single-use T multilayer adsorption theory and formula samples area. The reagents used for the nitrogen purity of 99.99%,:, 99.99% purity, high purity liquid nitrogen, anhydrous, analytical grade, industrial hydrochloric acid, glass wool, off}. The instrument for the ST-03-type surface and the hole by measuring 'nIolf} qU sorry EqtI ¨ ItI technology and equipment given device, measurement data processing system, the sample tubes, drying, the oven (maximum temperature 300), analytical balance (precision 0.1 mg). Determination of steps: the empty sample tube and dried at 120 ℃ for 30 minutes, release the dryer to cool to room temperature, the scale of its weight; the sample into the sample tube and dried at 120 ℃ for 2 hours, remove the desiccator to cool to room temperature standby; the weight of the sample obtained by subtraction, one end of the sample tubes stuffed with glass wool stored in the dryer; use a single continuous flow of gas chromatographic and adjust the gas to get relative pressure within the desired range; install the sample tube, connected to gas leak check; start circuit, open the oven thermostat switch, on the 120 ~ C files, ventilation heat the samples for 30 minutes, heat Conductivity bridge current control at 160 milliamperes; turn on your computer, start testing software, set up measurement parameters, adjust the baseline; to be some stability after the determination of the sample tube immersed in a Dewar flask filled with liquid nitrogen immediately data acquisition, change the polarity of the detector to achieve the adsorption sites, then a peak appears on the display for the absorption peak. After the baseline position to be back, remove the cover on the sample tube Dewar flask for desorption, and commutation, a peak appears on the display for the desorption peak. Show map of a few peak detection, observation of the baseline cut, judging the reasonableness of the peak baseline, if necessary,[link widoczny dla zalogowanych], modify the final determination of the result is the average of the results of two determinations, take to one decimal place. 5 Determination of the fine shades of aluminum hydroxide and mixing unsaturated polyester resins, under the effect of the curing agent to the hardening heat, get the module, measured by colorimeter L, a, b, AE values. Device is used in 100 ml glass beaker, thermostats, color difference meter, electronic balance, mold (diameter 77 mm, height of 15 mm polyethylene pipe). The reagents used for the unsaturated polyester resin, curing agent (methyl ethyl ketone peroxide or methyl ethyl ketone 55%). o analysis process is divided into five steps, namely, Weigh the sample, the sample temperature, sample mixing, curing, color determination. In 100 ml glass beaker accurately weighed 40.0 grams of unsaturated polyester resin, and then accurately weighed 60.0 grams superfine aluminum hydroxide standard sample and the same number of samples; to say good samples and resin placed in the thermostat, the control temperature of 25 ± 1 ℃, storage time 1 hour; to Superfine aluminum hydroxide samples have been gradually added to unsaturated polyester resin beaker,[link widoczny dla zalogowanych], stir mixture with a glass rod. Polyethylene resin paste on the board into the mold to the mold forming the high position. A sample to do two modules; first module 2 hours at room temperature hardening, and then put it to 50 ± 1 ℃ thermostat thermostat in the heat-curing 3 hours; and then adjusted the thermostat temperature is 25 ± 1 ℃, placed 2 hours to cool; measured by color meter module L,[link widoczny dla zalogowanych], a, b values and the values obtained with the standard sample the difference: △ L, Aa,[link widoczny dla zalogowanych], Ab, and calculated the difference △ E. Conclusion fine as aluminum hydroxide flame-retardant filler can not only fire, but also to prevent smoke, no droppings, no toxic gas, is an ideal environmentally friendly new materials; increase in ultra-fine aluminum hydroxide at high polymer Fill in the amount of material, can reduce product costs, but also improve the flame retardancy; master reasonably practicable, simple and fast aluminum hydroxide fine analysis of the main physical parameters for the development of new materials is of great significance. IV 2008 10 39 World non-ferrous metals

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