Polyhedral oligomeric silsesquioxane filled ablation-resistant ethylene-propylene-diene monomer rubber heat-insulating layer

Abstract

The invention discloses a polyhedral oligomeric silsesquioxane (POSS) filled ablation-resistant ethylene-propylene-diene monomer (EPDM) rubber heat-insulating layer. The POSS filled ablation-resistantEPDM rubber heat-insulating layer comprises the following components in parts by mass: 60 to 85 parts of EPDM rubber, 15 to 40 parts of neoprene, 15 to 25 parts of a reinforcing agent, 6 to 15 partsof organic fiber, 20 to 30 parts of high-temperature-resistant resin, 25 to 35 parts of high-temperature-resistant POSS, 8 to 40 parts of a modifier, 5 to 8 parts of a metal oxide, 4 parts of a vulcanizing agent and 2 parts of stearic acid. Grafting modification of the POSS on the EPDM rubber base material is realized by utilizing the POSS modifier; the POSS with excellent high-temperature resistance, the reinforcing agent, the resin and the organic fiber are added, so that the ablation resistance of the EPDM heat-insulating layer is obviously improved, and the product has excellent ablation resistance, is suitable for the thermal protection field which requires high-temperature-resistant ablation, and is particularly suitable for the thermal protection field of a solid rocket engine.

Description

technical field [0001] The invention relates to the technical field of ablation-resistant materials, in particular to a polyhedral oligomeric silsesquioxane (POSS) filled ablation-resistant ethylene-propylene-diene rubber (EPDM) thermal insulation layer. Background technique [0002] EPDM thermal insulation material is mainly based on EPDM rubber mixed with additives such as flame retardants, fibers and inorganic fillers. It has low density, aging resistance, ablation resistance, good thermal insulation performance and excellent mechanical properties. Therefore, it has been widely used as the inner heat insulation layer of solid rocket motors. However, the new generation of strategic and tactical missiles is more focused on high speed, high precision, high survivability and high reliability, which requires the EPDM insulation layer to have higher ablation resistance to cope with the high penetration and high mobility of missile weapons. [0003] Polyhedral oligomeric silses...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of polyhedral oligomeric silsesquioxane (POSS) filled ablation-resistant EPDM aiming at the deficiencies in the prior art that the existing EPDM heat insulation layer cannot meet the requirements of high overload and high maneuverability engines Thermal insulation layer, which has excellent ablation resistance and can meet the requirements of high overload and high maneuverability engines

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