Test device and test method for outgassing during pyrolysis of ablation-resistant phenolic resin

Abstract

The invention relates to a testing device of the gas release amount in the pyrolysis process of ablation-resistant phenolic resin and a testing method and belongs to the field of quantitative analysistest. The testing device comprises a sample cavity, a gas diffusing cavity, a heating system, a vacuum control system, a temperature control and measurement device, a pressure measurement device anda data acquisition and processing system, wherein the sample cavity is used for placing phenolic resin to be tested; the gas diffusing cavity is communicated with the sample cavity; the heating systemis used for heating the sample cavity and / or the gas diffusing cavity; the vacuum control system is used for vacuumizing the sample cavity and the gas diffusing cavity; the pressure measurement device is used for measuring the pressure in the gas diffusing cavity; the temperature control and measurement device is used for controlling the heating temperature and measuring the temperature of the sample cavity and the gas diffusing cavity; the data acquisition and processing system is used for determining the gas release amount in the pyrolysis process of the phenolic resin according to the pressure of the gas diffusing cavity and the temperatures of the sample cavity and the gas diffusing cavity. The testing device and the testing method have the beneficial effect that the accurate measurement for the process that the volume of gas released in the pyrolysis of the resin changes with the temperature is realized.

Description

technical field [0001] The invention relates to a test device and a test method for outgassing in the pyrolysis process of ablation-resistant phenolic resin, belonging to the field of quantitative analysis and test. Background technique [0002] The ablation-resistant phenolic resin-based composite material, as the main ablation thermal protection material for re-entry aircraft, will release a large amount of gas during the ablation process. These gases are mainly produced by the pyrolysis of phenolic resins. [0003] In the current research at home and abroad, there have been many reports on the qualitative and semi-quantitative analysis of the types and composition ratios of resin pyrolysis gases. However, due to the complex composition of resin pyrolysis gases, the gas states are different at different temperatures. For example, At an ambient temperature of 100 °C, the pyrolysis products are in three states: gas, liquid and solid, while at an ambient temperature of 300 °...

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Problems solved by technology

[0003] In the current research at home and abroad, there have been many reports on the qualitative and semi-quantitative analysis of the types and composition ratios of resin pyrolysis gases. However, due to the complex composition of resin pyrolysis gases, the states of gases are different under different temperature conditions. For example, At an ambient temperature of 100°C, the pyrolysis products have three states: gas, liquid and solid, while at an ambient temperature of 300°C, the pyrolysis products are all in the gaseous state. Accurate calculation of the pyrolysis gas volume of ablation-resistant phenolic resin Measuring is currently not possible

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