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Thermal insulation material glue content determination method

A thermal insulation material and measurement method technology, applied in the direction of weighing by removing certain components, can solve problems such as too much difference between the real content of the glue and the detected content, inaccurate test results, cumbersome test process, etc., to avoid violent reactions The effect of uncontrollable temperature, shortened test time, and high accuracy of test results

Inactive Publication Date: 2021-03-02
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in industrial production, there is the TG loss-on-ignition analysis method for the determination of the glue content in T-1 thermal insulation materials. However, this method has a cumbersome test process, high cost, and a small amount of test samples, resulting in the actual glue content in the sample being different from that of The detection content varies too much, the test results are inaccurate, and the dispersion is large

Method used

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  • Thermal insulation material glue content determination method
  • Thermal insulation material glue content determination method
  • Thermal insulation material glue content determination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 2g of the T-1 thermal insulation material sample, accurate to 0.0001g, which is 2.0968g, put it in a 150mL beaker with constant weight, weigh the total mass of the sample and the beaker, which is 86.2641g, add acetone and ethyl acetate Put 40mL of the mixed solvent prepared by ester at a weight ratio of 1:3 into the beaker containing the sample, heat it in a water bath at 35°C, stir for 1 min to fully disperse the sample in the beaker, let it stand for 1 min for a little precipitation, pour out the cloudy liquid, and leave Put the black floc (carbon fiber braid) in the beaker, add the mixed solvent repeatedly to dissolve it 4 times, until the mixed solvent solution is clear and translucent after stirring and dissolving, finally pour out the liquid, put the beaker and the insoluble matter in the oven at 130°C After drying for 0.5h, the solution in the beaker was completely dried up, transferred to a desiccator to cool to room temperature, and weighed, which was 85.3...

Embodiment 2

[0042] Weigh 2g of the T-1 thermal insulation material sample, accurate to 0.0001g, which is 2.2282g, put it in a 150mL beaker with constant weight, weigh the total mass of the sample and the beaker, which is 85.0760g, add acetone and ethyl acetate Put 40mL of the mixed solvent prepared by ester at a weight ratio of 1:2 into the beaker containing the sample, heat it in a water bath at 40°C, stir for 2 minutes to fully disperse the sample in the beaker, let it stand for 2 minutes, and then pour out the cloudy liquid after a little precipitation. Put the black floc (carbon fiber braid) in the beaker, add the mixed solvent repeatedly to dissolve 5 times, until the mixed solvent is clear and translucent after stirring and dissolving, finally pour out the liquid, put the beaker and the insoluble matter in the oven at 150°C for drying Dry for 0.5h until the solution in the beaker is completely dry, transfer it into a desiccator to cool to room temperature, and weigh the mass, which i...

Embodiment 3

[0046] Weigh 2.0132g of the T-1 thermal insulation material sample, place it in a 150mL beaker with constant weight, weigh the total mass of the sample and the beaker, which is 84.7808g, add acetone and ethyl acetate at a weight ratio of 1:2 Put 40mL of mixed solvent in the beaker containing the sample, heat it in a water bath at 40°C, stir for 2 minutes to fully disperse the sample in the beaker, let it stand for 1 minute to settle slightly, and then pour out the turbid liquid, leaving black floc (carbon fiber braided fabric) In the beaker, repeatedly add the mixed solvent to dissolve 4 times until the mixed solvent solution is clear and translucent after stirring and dissolving, and finally pour out the liquid, put the beaker and the insoluble matter in the oven at 130°C for 1 hour, until the solution in the beaker is completely Dry, move into a desiccator to cool to room temperature, weigh the mass, which is 83.9143g. Calculate the glue content based on the reduced mass of ...

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Abstract

The invention discloses a thermal insulation material glue content determination method, which comprises: accurately weighing a thermal insulation material sample to be determined, placing in a constant weight container, adding a mixed solvent to the container, completely dispersing the sample in the solvent, carrying out standing precipitation, pouring out the liquid in the container, and remaining insoluble substances in the container; drying the container filled with the insoluble substances to completely volatilize the solution in the container, and weighing the mass of the container and the insoluble substances; and finally calculating the glue content of the thermal insulation material according to the reduced mass of the sample. The test method is simple and efficient, the test process and result are easy to judge and control, and the result with good accuracy and consistency can be obtained.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor testing, in particular to a method for measuring the glue content of a T-1 thermal insulation material. Background technique [0002] The heat insulation layer is an important part of the heat-resistant structure of the solid rocket motor, which plays a role in preventing the temperature in the combustion chamber of the engine from reaching its structural integrity and resisting high temperature, high gas flow and particle erosion. [0003] Carbon fiber reinforced thermal insulation material (T-1 thermal insulation material) is made of carbon fiber braid impregnated with phenolic resin and nitrile rubber glue, which has good thermal insulation, ablation resistance, erosion resistance and other properties. The glue content of phenolic resin and nitrile rubber in T-1 thermal insulation material must be sufficient to ensure that the carbon fiber skeleton can be fully filled under the proce...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 王娜廖建苹冯晓欢黄曦徐红菊王艳艳黄水生闫志佳张炳林
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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