Elastomeric Heat-Shielding Materials for Internal Surfaces of Missile Engines

Donskoy, A. A.

doi:10.1080/00914039608029377

Cited by 37 publications

(25 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The elasticity of the modified composite was lost after the incorporation of phenolic resin . GTR‐V‐44, GTR‐V‐45, and Garlock 7765 are some commercially available HSMs made of NBRs with the inclusion of silicon dioxide and asbestos as fillers . Zhao et al prepared the chopped polyimide (PI) fiber–filled NBR insulation for SRM by the surface modification of chopped PI fibers under oxygen plasma and thereafter by mixing it with NBR in a 2‐roll mill.…”

Section: A Focus On Ehsms For Srmmentioning

confidence: 99%

“…DC 93‐104, another prominent silicon insulator, is composed of silicone elastomer loaded with silica, silicon carbide, and carbon fibers . It has high viscosity, high char retention, and low ablation rate even under the domination of high shear stress environments that has been used as protective coating for rocket motor cases and ramjet combustion chambers . DC 93‐104 was modified with asbestos or PI fibers .…”

Section: A Focus On Ehsms For Srmmentioning

confidence: 99%

“…They do not possess the ability to form cokes without the introduction of special additives due to the linear chain structure of elastomers, thus no solid carbonic residue on thermal decomposition. Also, elastomers have high elongation at break and the capacity to withstand the mechanical and the thermal stresses during the manufacturing and in use …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent developments in elastomeric heat shielding materials for solid rocket motor casing application for future perspective

George

Panda

Mohanty

et al. 2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

Catastrophic breakdown that occurs during the flight of supersonic vehicles demands more focused research in the insulation of rocket engines. At present, optimization of polymeric ablatives as viable insulation for solid rocket motor casing has a prominent role in the successful mission of rockets. Among polymers, elastomer serves an imperative part. Comprehensive investigations were disclosed, especially in the elastomeric heat shielding materials with various reinforcing agents. In this paper, research progress of mostly used elastomers is reviewed, and a circumstantial understanding about the features of ablation and insulation has been validated. 2-4 Therefore, to protect the vehicle from miserable failure of spacecraft, some design features are added to cope with the aerodynamic heating. 5Thermal protection system (TPS) materials impart heat shield to protect the structure, aerodynamic surface and the payload of missiles, and those vehicles interacting with the hypersonic environment. 6,7 Polymeric ablative materials serve to effect as TPS that defends space vehicles and probes during the atmospheric entry; they are effective to produce passively cooled rocket combustion chambers 8 and to render insulation to the solid rocket motors (SRMs) at high temperature. [9][10][11] Although some nonpolymeric materials such as inorganic polymers/ceramics or metals have been used as ablative TPS, polymeric ablatives represent the most flexible category of ablatives. In contrast to the inorganic polymers, polymer ablatives have more inborn benefits: high-heat shock resistance, lower density, good mechanical strength, and thermal insulation capabilities. 12The broad range of heat shielding materials (HSMs) for rocket motor casing is produced from reinforced thermosets or elastomers. [13][14][15][16][17][18][19] The most assuring material for the HSM for rocket motors is the elastomers, which can be produced as rubbers, foamed rubbers, or fiber-reinforced composite materials. On the grounds of lightweight, low thermal conductivity, stability in the mechanical and thermal stresses during the operation, elastomeric HSMs (EHSMs) can find relevance in the insulation of SRM casing where thermal insulation is a prime necessity. They do not possess the ability to form cokes without the introduction of special additives due to the linear chain structure of elastomers, thus no solid carbonic residue on thermal decomposition.Also, elastomers have high elongation at break and the capacity to withstand the mechanical and the thermal stresses during the manufacturing and in use. 20This review puts the elastomeric materials as ablative insulators for SRM into frame and would confer the readers the progress that has been attained in developing relatively low surface eroding and ablative insulating systems for SRM. These systems can be used to manufacture variety of ablative TPS systems for rocket motor casing application and would provide an idea regarding the composite system that would behave elastomeric as well as ablative. Scrutini...

show abstract

Section: A Focus On Ehsms For Srmmentioning

confidence: 99%

Section: A Focus On Ehsms For Srmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent developments in elastomeric heat shielding materials for solid rocket motor casing application for future perspective

George

Panda

Mohanty

et al. 2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Elastomeric heat shielding materials (EHSMs) are a class of ablatives commonly used in those applications in which the material has to work as an insulation to protect structural parts against high temperatures and, at the same time, has to exhibit high elongation at break . For example, the protection against high temperature combustion gases of the structural case of solid rocket motors (SRMs) is generally constituted by an elastomeric liner placed between the case and the solid propellant grain . Its primary function is to prevent the rocket motor case from reaching temperatures that could compromise its structural integrity and it also has to exhibit a high strain capability in order to absorb the mechanical stresses induced to the rocket motor during propellant casting, storage, transportation, and flight.…”

Section: Introductionmentioning

confidence: 99%

Effect of liquid resol on the mechanical and thermal properties of EPDM/Kynol elastomeric heat shielding materials

Rallini

Puri

Torre

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

The state of the art of heat shielding materials is represented by a rubber matrix reinforced with aramid (Kevlar®/Twaron®) or phenolic (Kynol®) pulp or fibers that exhibit excellent thermal stability and mechanical properties. In this work, Kynol® short fibers were used as reinforcement for an EPDM matrix modified with liquid phenolic resin and the heat shielding materials were studied in terms of mechanical, thermal, and ablative properties. A chemical coupling agent was used to improve the adhesion of the polar phenolic matrix with non‐polar EPDM phase. It was found that the thermal stability of the heat shielding materials was not affected by the presence of phenolic that, on the other hand, increased the deformability of rubber. In oxy‐acetylene torch tests, EPDM/Kynol formulation, with no addition of liquid phenolic, was characterized by a carbonaceous residue with the smaller dimensional change and the higher adhesion on the virgin material while the presence of the phenolic reduced the structural integrity of char and its adhesion to the substrate. The value of the heat capacity of composites increased with the increase of the phenolic content. POLYM. ENG. SCI., 57:513–520, 2017. © 2017 Society of Plastics Engineers

show abstract

“…삭마 효과는 고열 또 는 에너지의 축적이 재료 표면에 발생되어 표면을 깎아내 리는 현상을 의미한다 [2]. 페놀 수지는 방향족 구조와 많은 수산화기들의 조합으로 이루어진 고분자 수지이다.…”

unclassified

Microstructure and Ablation Performance of CNT-phenolic Nanocomposites

Wang¹,

Kwon²,

Park³

et al. 2013

Composites Research

View full text Add to dashboard Cite

Highly ablation resistant carbon nanotube (CNT)-phenolic composites were fabricated by the addition of low concentrations of CNT nanofiller. Tensile and compressive properties as well as ablative resistance were significantly improved by the addition of only 0.1 and 0.3 wt% of uniformly dispersed CNTs. An oxygen-keroseneflame torch and a field emission scanning electron microscope (FE-SEM) were used to evaluate the ablative properties and microstructures of these CNT-phenolic composites. Thermal gravimetric analysis (TGA) revealed that the ablation rate was lower for the 0.3 wt% CNT-phenolic composites than for neat phenolic or the composite with 0.1 wt% CNT. Ablative mechanisms for all three materials were investigated using this TGA in conjunction with microstructural studies using a FE-SEM. The microstructural studies revealed that CNT acted as an ablation resistant phase at high temperatures, and that the uniformity of dispersion of the CNT played an important role in this resistance to ablation.

show abstract

Elastomeric Heat-Shielding Materials for Internal Surfaces of Missile Engines

Abstract: The requirements, testing procedures, compositions, and the performance characteristics of elastomeric heat-shielding materials for internal surfaces of missile engines are reviewed. KEY WORDS Heat shielding materials, missile engines, internal surfaces, high temperature elastomers.

Cited by 37 publications

References 18 publications

Recent developments in elastomeric heat shielding materials for solid rocket motor casing application for future perspective

Recent developments in elastomeric heat shielding materials for solid rocket motor casing application for future perspective

Effect of liquid resol on the mechanical and thermal properties of EPDM/Kynol elastomeric heat shielding materials

Microstructure and Ablation Performance of CNT-phenolic Nanocomposites

Contact Info

Product

Resources

About