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A low-temperature mechanical performance prediction method for PBT propellants based on reversed-phase gas chromatography data and formula

A technology of reversed-phase gas chromatography and propellant, applied in the field of solid propellant, can solve the problems of danger, high time and economic cost, long cycle and the like

Active Publication Date: 2021-02-05
NAT UNIV OF DEFENSE TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of test methods to characterize mechanical properties has the advantage of reliable results, but the test period is long and the cost is high, especially for high and low temperature tests, which require more precise control of test conditions such as temperature, which requires high time and economic costs, and The test object is a composite solid propellant, which is a kind of energetic material, and there are certain dangers in the preparation process and test process

Method used

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  • A low-temperature mechanical performance prediction method for PBT propellants based on reversed-phase gas chromatography data and formula
  • A low-temperature mechanical performance prediction method for PBT propellants based on reversed-phase gas chromatography data and formula
  • A low-temperature mechanical performance prediction method for PBT propellants based on reversed-phase gas chromatography data and formula

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Experimental program
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Embodiment 1

[0068] In this implementation, four different formulations of PBT composite solid propellants are estimated.

[0069] Specific steps are as follows:

[0070] (1) Interfacial acid-base interaction enthalpy of main filler-PBT matrix in PBT propellant

[0071] Using GC112A gas chromatograph, select thermal conductivity detector (TCD) to test. Test conditions: Helium is used as the carrier gas, and the carrier gas flow rate is 30mL / min. The temperatures of the vaporization chamber and the TCD were 120°C and 150°C, respectively. Use a micro-sampler to inject samples, each injection volume is 0.3-0.5 μL. The retention times of the three probe molecules of n-hexane, ethyl acetate and chloroform were measured at the column temperature of 50°C, 70°C, 90°C and 110°C, respectively. According to the test results of the retention time of probe molecules in the chromatographic column at different temperatures, the specific retention volume of the filler and the matrix is ​​calculated ac...

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Abstract

Provides a method for predicting low-temperature mechanical properties of PBT propellants based on reversed-phase gas chromatography data and formulations. By testing the acidic parameters and basic parameters of the main fillers in the propellant and the surface of the matrix, according to the acid-base interaction theory of interface bonding , calculate the enthalpy of acid-base interaction at the filler-matrix interface, and use it as a quantitative characterization parameter for the characteristics of the filler-matrix interface. parameter to estimate the maximum tensile strength at low temperature (σ m ) and maximum elongation (ε m ).

Description

technical field [0001] The invention relates to the technical field of solid propellants, in particular to a method for predicting low-temperature mechanical properties of PBT propellants based on reversed-phase gas chromatography data and formulations. Background technique [0002] Modern high-tech warfare puts forward high requirements on the penetration capability and survivability of missiles. Increasing range, increasing flight speed, improving maneuverability and enhancing concealment are the development directions of missiles, which makes the composite solid propulsion in rocket engines The propellant grain bears more severe mechanical loads, which puts forward higher requirements on the mechanical properties of composite solid propellants. [0003] From the perspective of material system, composite solid propellant is a particle-reinforced polymer-based composite material, and its continuous phase, that is, the elastic matrix is ​​composed of cured binder and plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/89
CPCG01N30/89
Inventor 周星鲍桐张炜邓蕾干效东张惠坤徐亚龙
Owner NAT UNIV OF DEFENSE TECH
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