Influence of different propellant systems on ablation of EPDM insulators in overload state

Guan, Yiwen; Jiang, Li; Liu, Yang; Xu, Tuanwei

doi:10.1016/j.actaastro.2018.01.048

Cited by 14 publications

(4 citation statements)

References 11 publications

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“…Today, the solid rocket motor (SRM) is widely used in the aerospace field. The insulation is a thermal protection material located between the inner surface of the shell and the propellant in the SRM [ 1 ]. Its main function is to remove most of the heat through its continuous decomposition and ablation to slow down the propagation speed of the high temperature of the gas to the shell, avoid the shell reaching the temperature that endangers its structural integrity, and ensure the normal and safe operation of the SRM [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Zhu

Zhang

et al. 2023

Polymers

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The excessive migration of small molecular plasticizers in solid propellants may lead to debonding and changes in combustion characteristics, affecting the safety of solid rocket motors. Herein, two functionalized graphene oxides (GO) were used to enhance the anti-migration performance of EPDM insulation. GO, 3-Aminopropyltriethoxysilane-modified GO (AGO) and octadecylamine-modified GO (HGO) were filled into EPDM to fabricate EPDM insulation. The anti-migration properties and migration kinetics of EPDM insulations were studied using immersion tests. Moreover, the mechanical properties, including the tensile properties, crosslink density, hardness, and aging resistance of different EPDM insulations, were also explored. Compared with GO, AGO, and HGO obviously enhanced the anti-migration and mechanical properties of the EPDM insulations. This study shows that the anti-migration performance of EPDM insulation can be enhanced by functionalized GO.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Zhu

Zhang

et al. 2023

Polymers

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“…The use of insulation enables the motor case from erosion by high-temperature particles and gas flow generated during propellant burning. 1 In order to increase the flexibility of insulation and improve the mechanical properties of propellants, 2,3 plasticizers are used. Most of these plasticizers are esters compatible with nitroglycerin (NG) and nitrocellulose (NC), such as dioctyl phthalate (DOP), dioctyl adipate (DOA), dibutyl phthalate (DBP), and so forth.…”

Section: Introductionmentioning

confidence: 99%

“…Insulation materials are widely applied in chemical propulsion systems such as solid propellant based rocket engines also known as solid rocket motors (SRM). The use of insulation enables the motor case from erosion by high‐temperature particles and gas flow generated during propellant burning 1 . In order to increase the flexibility of insulation and improve the mechanical properties of propellants, 2,3 plasticizers are used.…”

Section: Introductionmentioning

confidence: 99%

Anti‐migration performance of EPDM composite improved by octadecylamine‐functionalized graphene oxide

Zhang

et al. 2022

J of Applied Polymer Sci

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In this paper, the ethylene propylene diene monomer (EPDM) was used as a composite matrix and octadecylamine-functionalized graphene oxide (GA) was applied as insulation nanofiller to prevent plasticizer migration. To study the anti-migration behavior of EPDM under plasticizer environment and different temperatures, we investigated the diffusion of dioctyl phthalate (DOP) in EPDM and its composites. The migration kinetics of DOP into EPDM composites with respect to filler and temperature were observed by the immersion absorption method. The process is dynamic and conforms to Fick's law. The composite show a 90% increase in tensile strength and 151% improvement in elongation at break by the addition of 5 phr filler of GA. Meanwhile, the EPDM/GA composite show an obviously improved anti-migration performance, compared to pure EPDM at different temperatures, the composite show a 22.68%, 17.35%, 14.95%, 7.63% increase. Well layer-structure of graphene offers a chance to improve the anti-migration performance of insulation.

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“…EHSMs can work in many physical and/or chemical processes during ablation, such as melting, sublimation, heating shielding, pyrolysis, ceramic reaction and carbonisation [5]. During the ablation process, the formation of the anti-ablation layer on the surface of EHSMs provides thermal insulation to SRM [6].…”

Section: Introductionmentioning

confidence: 99%

Ablation and thermal insulation properties of silicone rubber-polyarylacetylene-carbonwoven laminates for solid rocket motor

Jiang

Jin

Gao

2021

Plastics, Rubber and Composites

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Silicone rubber-polyarylacetylene-carbon woven laminates (SRWL) with two-dimensional structure were prepared using needled technique. The ablation and insulation mechanism of SRWL were investigated by oxyacetylene flame system, equilibrium swelling technique, thermogravimetry (TG), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Results showed that the molecular weight between the crosslinks of the interlaminar complex is reduced with the increasing of the content of polyarylacetylene (PA). SRWL with PA has superior anti-ablation properties and high residue compared with that of without PA. With the increasing of PA content, the linear ablation rate of SRWL first decreases and then increases. When the content of PA is 10 phr, the linear ablation rate is 0.0276 mm s −1 and the back-face temperature peak is 71 °C. SRWL filled with 10 phr concentration of PA show comparably improved ablation properties and PA hinders the thermal transmission because of forming of compactly integrated self-protection refractory layer, ceramic compounds such as SiC, Si and some endothermic behaviour.

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Influence of different propellant systems on ablation of EPDM insulators in overload state

Cited by 14 publications

References 11 publications

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Anti‐migration performance of EPDM composite improved by octadecylamine‐functionalized graphene oxide

Ablation and thermal insulation properties of silicone rubber-polyarylacetylene-carbonwoven laminates for solid rocket motor

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