Ablation-resistant rubber type thermal insulation layer and preparation method thereof
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A rubber-type, ablation-resistant technology, applied in the field of heat-resistant materials, to achieve the effect of improving ablation resistance
Active Publication Date: 2017-04-26
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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However, there is no report on the application of polyphenylene sulfide fiber alone or in c
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Embodiment 1
[0029] Embodiment 1: Add 85 parts of EPDM rubber, 15 parts of chloroprene rubber, gas-phase method Si in 25 ℃ of double-roll mills successively. 2 35 parts, 6 parts of zinc oxide, 4 parts of magnesium oxide, 15 parts of PPS fiber, 10 parts of aramid fiber, 20 parts of carbon black, knead until uniformly mixed, and finally add 3.5 parts of dicumyl peroxide, knead, thin pass Uniform, out of the film. Vulcanize for 40 minutes in a flat vulcanizer at 160° C. to obtain the ablation-resistant rubber-type heat insulating layer of the present invention.
[0030] Oxyacetylene wire ablation rate: 0.075mm / s
Embodiment 2
[0031] Embodiment 2: Add 80 parts of EPDM rubber, 20 parts of chloroprene rubber, precipitation method Si in 25 ℃ of double-roll mills successively. 2 40 parts, 5 parts of zinc oxide, 2 parts of magnesium oxide, 20 parts of PPS fiber, 10 parts of aramid fiber, 30 parts of carbon black, knead until uniformly mixed, and finally add 5 parts of dicumyl peroxide, knead, thin pass Uniform, out of the film. Vulcanize for 40 minutes in a flat vulcanizer at 160° C. to obtain the ablation-resistant rubber-type heat insulating layer of the present invention.
[0032] Oxyacetylene wire ablation rate: 0.067mm / s
Embodiment 3
[0033] Embodiment 3: Add 90 parts of EPDM rubber, 10 parts of chloroprene rubber, gas-phase method Si in 25 ℃ of double-roll mills successively. 2 30 parts, 5 parts of zinc oxide, 3 parts of magnesium oxide, 25 parts of PPS fiber, 5 parts of aramid fiber, knead until evenly mixed, finally add 25 parts of carbon fiber, 4 parts of dicumyl peroxide, knead, thin and even , out of the film. Vulcanize for 40 minutes in a flat vulcanizer at 160° C. to obtain the ablation-resistant rubber-type heat insulating layer of the present invention.
[0034] Oxyacetylene wire ablation rate: 0.072mm / s
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Abstract
The invention discloses an ablation-resistant rubber type thermal insulation layer and a preparation method thereof. Polyphenylene sulfide fiber is used and is matched with other auxiliary agent systems of silicon dioxide, heat-resistant carbon fillers, metallic oxide, aramid fiber and the like, so that the ablation-resistant performance of thermal insulation materials is obviously improved; and 70 to 100 parts of EPDM (Ethylene-Propylene-Diene Monomer), 0 to 30 parts of chloroprene rubber, 20 to 40 parts of silicon dioxide, 6 to 15 parts of metallic oxide, 10 to 30 parts of heat-resistant fillers, 10 to 30 parts of heat-resistant carbon fiber and 3 to 6 parts of cross-linking agents are used for obtaining the ablation-resistant rubber type thermal insulation layer provided by the invention through two-roll open milling and hot pressing vulcanization molding. The ablation-resistant rubber type thermal insulation layer containing the filled polyphenylene sulfide fiber has excellent ablation-resistant performance. The material is applicable to the thermal protection field with high-temperature-ablation-resistant requirements, and is particularly applicable to the technical field of instant high-temperature ablation thermal protection.
Description
technical field [0001] The invention relates to the technical field of heat-resistant materials, in particular to an ablation-resistant rubber-type heat-insulating layer and a preparation method thereof. Background technique [0002] Ablation-resistant materials refer to the physical and chemical changes of decomposition, melting, evaporation, sublimation and other heat-absorbing physical and chemical changes of the material itself under the action of heat flow. The mass consumption of the material itself takes away a large amount of heat or forms a dense protective layer, thereby preventing heat conduction to the A material that causes damage to its internal structure. As a special ablation-resistant material between the solid propellant and the shell, the thermal insulation layer is an important part of high-performance solid rocket motors in many aircraft and missile weapons. During the working process of the engine, the heat insulation layer is directly exposed to high-...
Claims
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