Preparation method of ablation-resistant anti-scouring ethylene-propylene-diene monomer rubber heat insulating material

Abstract

The invention relates to a preparation method of an ablation-resistant anti-scouring ethylene-propylene-diene monomer rubber heat insulating material. The preparation method comprises the following steps: S1, adopting an ethylene-propylene-diene monomer rubber material as a matrix material, and adding an ablation-resistant auxiliary material, fibers, a softener, a reinforcing agent, a vulcanizingsystem and other preservatives into the matrix material; S2, carrying out plastication and mixing procedures, and formulating a basic formula meeting mechanical and ablation performance; S3, manufacturing small samples, mechanical test pieces and ablation test pieces, and detecting mechanical and ablation performance; S4, analyzing performance detection data on the basis of detection, and adjusting the proportion of the auxiliary materials; S5, adjusting the formula, and then preparing small samples; S6, preparing mechanical test pieces, ablation test pieces, heat-conducting test pieces and density test pieces, carrying out detection to obtain detection data, and finally detecting a final formula; and S7, preparing a novel material according to the final formula to obtain the heat insulating material. The heat insulating material provided by the invention has the advantages of low density, good anti-scouring and ablation-resistant performance, excellent bonding performance and excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, and in particular relates to a preparation method of an ablation-resistant and scour-resistant EPDM thermal insulation material. Background technique [0002] The primary function of the insulation layer is to insulate the solid rocket motor combustor casing to prevent the rocket motor casing from reaching temperatures that would endanger its structural integrity. In addition, the thermal insulation layer also plays a role in controlling the combustion surface of the solid propellant grain, buffering the transfer of shell strain to the solid propellant, preventing the migration of fluid chemical components in the rocket engine, preventing the combustion products from scouring the shell, and sealing the shell. , joints and accessories to prevent pressure loss and damage to it by thermal combustion products; guide combustion products to enter the nozzle in a laminar flow to the...

AI Technical Summary

Problems solved by technology

For example, in the early stage, the large solid rocket motors used in different types of strategic missiles and the small solid rocket motors used in tactical missiles in our country sometimes used the same insulation material formula (in some models in active service), and the difference between strategic and tactical solid rocket motors The characteristics are not well considered, and the design of the artificial debonding layer of the thermal insulation layer is relatively backward