A method for evaluating the release of phosphine from a phosphorus-based flame retardant and its application

A phosphorus-based flame retardant and evaluation method technology, which is applied in the field of material chemical analysis and detection, can solve problems such as difficult detection, and achieve the effects of fast detection, optimized processing technology, and accurate detection results

Active Publication Date: 2020-07-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, for the relatively low release of phosphine, it is also difficult to detect the

Method used

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  • A method for evaluating the release of phosphine from a phosphorus-based flame retardant and its application
  • A method for evaluating the release of phosphine from a phosphorus-based flame retardant and its application
  • A method for evaluating the release of phosphine from a phosphorus-based flame retardant and its application

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses an evaluation method of the phosphine release amount of a phosphoric series flame retardant and application of the evaluation method. The method includes the following steps: method 1, in an open system, or method 2, in a sealed system, first transferring phosphine in a form of a phosphorus containing substance to a solution with the help of a metal sheet, and measuring thecontent of phosphorus in the solution through an inductively coupled plasma-optical emission spectrometer so as to measure the phosphine release amount in the system indirectly. The metal sheet is selected from a copper sheet with a surface coated with copper-loading microspheres, or a silver sheet with a surface coated with silver-loading microspheres. The detection method of the invention is convenient, simple and easy to implement, and a phosphine can be completely absorbed, thus a detection result of the phosphine release amount is more accurate.

Description

technical field [0001] The invention belongs to the technical field of material chemical analysis and detection, and in particular relates to an evaluation method for the release amount of phosphine from a phosphorus-based flame retardant. Background technique [0002] Inorganic phosphorus-based flame retardants refer to a class of flame retardants that contain phosphorus and achieve flame retardant effects through the action of phosphorus in the combustion process, mainly including red phosphorus, ammonium polyphosphate and phosphate. Inorganic phosphorus-based flame retardants are favored due to their excellent flame retardant effect, good thermal stability, non-volatile, halogen-free, and little impact on mechanical properties. Polymer material is one of the three major materials with equal emphasis on ceramic materials and metal materials, and has a wide range of applications in the fields of electronics, automobiles, and construction. However, since the main chain of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73G01N1/22G01N1/28
CPCG01N1/2226G01N1/28G01N21/73
Inventor 李向梅陈志李雨洋杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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