Evaluation method of phosphine release amount of phosphoric series flame retardant and application of evaluation method
A phosphorus-based flame retardant and evaluation method technology, applied in the field of chemical analysis and detection of materials, can solve problems such as difficult detection, and achieve the effects of quick detection, optimized processing technology, and wide detection limit
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Embodiment 1
[0056] Embodiment 1 detects phosphine release in open system (method 1)
[0057] (1) Take 3g of red phosphorus flame retardant powder and put it into a glass petri dish without a cover, immerse half of a 30mm×5mm×1.5mm pure copper sheet in the powder, and fully contact with the air. Set the constant temperature and humidity chamber parameters as 23°C, 50RH% and 40°C, 70RH% respectively;
[0058] (2) After 14, 21, and 28 days, take out the corroded copper sheet with tweezers, transfer it into a 50mL beaker filled with 10mL 3.65wt% dilute hydrochloric acid, seal the bottle mouth with plastic wrap, and let it stand for 48 hours;
[0059] (3) Take out the copper sheet, transfer the solution containing the corrosion product to a 10mL reagent bottle, and measure the content of phosphorus element with an inductively coupled plasma emission spectrometer. The results are shown in Table 1.
[0060] Table 1 The quality of phosphorus in flame retardants measured by inductively coupled pl...
Embodiment 2
[0062] Embodiment 2 detects phosphine release in closed system (method 2)
[0063] (1) Take a 500mL jar and two 50mL test tubes, pour about 40mL of deionized water into one of the test tubes, add 3g of red phosphorus flame retardant powder into the other test tube, and place a 30mm×5mm×1.5mm Insert half of the pure copper sheet vertically into the powder, put the two test tubes into the jar and place them in a drying oven at 80°C, the temperature can be controlled at 80°C, and the relative humidity is 75RH%;
[0064] (2) Carry out three groups of parallel tests, take out copper piece with tweezers after 14, 21, 28 days, transfer in the 50mL beaker that 10mL3.65wt% dilute hydrochloric acid is housed, seal the bottle mouth with plastic wrap, leave standstill for 48 hours;
[0065] (3) Take out the copper sheet, transfer the solution containing the corrosion product to a 10mL reagent bottle, and measure the content of phosphorus element with an inductively coupled plasma emission...
Embodiment 3
[0068] Embodiment 3 In the prior art, directly detect phosphine release amount (method 0)
[0069] (1) Put 3g of red phosphorus flame retardant into a 500mL dry gas collection bag, seal it and put it into a constant temperature drying oven at 80°C;
[0070] (2) Take out the collection bag after 14, 21, and 28 days respectively, connect the phosphine detector and the gas collection pump through a rubber hose, introduce the gas in the collection bag into the detector, detect the content of phosphine, and the test result as shown in Table 3.
[0071] Phosphine concentration in red phosphorus flame retardant tested by table 3 gas detector
[0072]
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