Ceramic enhanced ethylene propylene diene monomer material and preparation method

Abstract

The invention discloses a ceramic enhanced ethylene propylene diene monomer material. The ceramic enhanced ethylene propylene diene monomer material is prepared from the following materials in parts by weight: 100 parts of ethylene propylene diene monomer, 20 to 30 parts of ceramic fiber, 20 to 40 parts of white carbon black, 0.5 to 1 part of stearic acid, 1 to 2 parts of an accelerant TMTD (Tetramethylthiuram Disulfide), 1 part of KH550 and 1 to 2 parts of DCP (Dicumyl Peroxide). According to the ceramic enhanced ethylene propylene diene monomer material disclosed by the invention, the ceramic fibers are added into the ethylene propylene diene monomer so that the carbon content in the material is effectively reduced and the ratio of other metal materials is increased, so that the ablation resistance can be greatly improved under an oxygen-rich environment and normal work of a rocket engine is facilitated. The KH550 is added so that the compatibility among the ceramic fibers, the white carbon black and the ethylene propylene diene monomer is facilitated. The ceramic enhanced ethylene propylene diene monomer material has good mechanical properties and relatively low linear ablation rate, has good utilization performances and stable quality and meet actual research and development and production requirements.

Description

technical field

[0001] The invention belongs to the technical field of thermal insulation materials for solid rocket motors, and in particular relates to a ceramic fiber reinforced EPDM material and a preparation method. Background technique

[0002] Solid rocket motors usually use traditional rubber-based insulation materials. In order to solve the problem that the material decomposes while peeling off and cannot form a carbonized layer of the material, fixed-length carbon fiber (tile) reinforced phenolic modified nitrile rubber insulation material and braided carbon fiber have been developed. Reinforced phenolic modified nitrile rubber insulation. This type of material has superior performance, but with the improvement of engine performance, especially when working in an oxygen-rich environment, carbon fiber is easy to oxidize and burn, which reduces its ablation resistance. Contents of the invention

[0003] The purpose of the present invention is to provide a ceramic ...

Examples

Embodiment 1

[0020] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 20 parts of ceramic fiber, 20 parts of white carbon black, and 0.5 parts of stearic acid 1 part, accelerator TMTD 1 part, KH550 1 part, DCP 1 part.

[0021] The specific steps are:

[0022] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0023] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0024] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.

Embodiment 2

[0026] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 30 parts of ceramic fiber, 40 parts of white carbon black, and 1 part of stearic acid 1 part, accelerator TMTD 2 parts, KH550 1 part, DCP 2 parts;

[0027] The specific steps are:

[0028] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0029] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0030] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.

Embodiment 3

[0032] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 30 parts of aluminum silicate fiber, 40 parts of white carbon black, stearic acid 1 part, accelerator TMTD 2 parts, KH550 1 part, DCP 2 parts;

[0033] The specific steps are:

[0034] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0035] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0036] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.

technical field

[0001] The invention belongs to the technical field of thermal insulation materials for solid rocket motors, and in particular relates to a ceramic fiber reinforced EPDM material and a preparation method. Background technique

[0002] Solid rocket motors usually use traditional rubber-based insulation materials. In order to solve the problem that the material decomposes while peeling off and cannot form a carbonized layer of the material, fixed-length carbon fiber (tile) reinforced phenolic modified nitrile rubber insulation material and braided carbon fiber have been developed. Reinforced phenolic modified nitrile rubber insulation. This type of material has superior performance, but with the improvement of engine performance, especially when working in an oxygen-rich environment, carbon fiber is easy to oxidize and burn, which reduces its ablation resistance. Contents of the invention

[0003] The purpose of the present invention is to provide a ceramic ...

Examples

Embodiment 1

[0020] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 20 parts of ceramic fiber, 20 parts of white carbon black, and 0.5 parts of stearic acid 1 part, accelerator TMTD 1 part, KH550 1 part, DCP 1 part.

[0021] The specific steps are:

[0022] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0023] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0024] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.

Embodiment 2

[0026] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 30 parts of ceramic fiber, 40 parts of white carbon black, and 1 part of stearic acid 1 part, accelerator TMTD 2 parts, KH550 1 part, DCP 2 parts;

[0027] The specific steps are:

[0028] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0029] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0030] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.

Embodiment 3

[0032] A ceramic fiber reinforced EPDM material, which is made of the following materials in parts by weight: 100 parts of EPDM rubber, 30 parts of aluminum silicate fiber, 40 parts of white carbon black, stearic acid 1 part, accelerator TMTD 2 parts, KH550 1 part, DCP 2 parts;

[0033] The specific steps are:

[0034] 1) Knead the EPDM rubber with a kneading machine, first add raw rubber, refine for 1-3 minutes, then add white carbon black and stearic acid, refine for 40-60 minutes, and finally add ceramic fiber and accelerator , KH550, DCP, refining for 20-25 minutes;

[0035] 2) After the mixing is completed, store the rubber material in the internal mixer for 24h-48h, and then carry out vacuum mixing, the refining time is 20-30min, and the temperature is ≤40°C; then, the material is obtained.

[0036] The performance data of the material after vulcanization for 1 hour at 150°C and 2MPa pressure are shown in Table 1.