Effect of aramid and carbon fibers with nano carbon particles on the mechanical properties of EPDM rubber thermal insulators for solid rocket motors application

Enew, Ahmed M.; El‐Fattah, M. Abd; Fouda, Safaa R.; Hawash, Samah A.

doi:10.1016/j.polymertesting.2021.107341

Cited by 13 publications

(10 citation statements)

References 8 publications

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“…A remote control is equipped by the test machine which controls the software and enables obtaining results and print produced data with low effort. There are some equations used for the measurement of tensile strength and young's modulus specimen have some specifications 'as in equations ((1),( 2),( 3),( 4),( 5),( 6))' [70]. Tensile strength (1) Tensile strength at yield (psi)…”

Section: Mechanical Properties Measurementsmentioning

confidence: 99%

Study of Elastomeric Heat Shielding Materials for Solid Rocket Motor Insulation

Mosa

Kotb

Fouda

et al. 2022

J. Phys.: Conf. Ser.

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Thermal insulation of solid rocket motor casing is necessary to overcome the catastrophic breakdown during the rocket propellant combustion. In our study, a comprehensive review on different types elastomeric heat shielding materials (EHSMs) such as polyurethane, silicon rubber, ethylene propylene diene monomer (EPDM) and nitrile rubber was conducted. Various types of fillers are added to the EHSMs to enhance their thermal, mechanical and ablative performances. The charring phenomenon, which offers a means of protection to the virgin polymer layer from direct flame, as well as the synergetic effect, that may occur between fillers and polymer matrices, were studied. All different methods and machines used for manufacturing EHSMs are described in detail. Moreover, the different techniques used to characterize the EHSMs are discussed. Last but not least, the empirical models that relate the thermal insulation performance to the filler concentration are presented.

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Section: Mechanical Properties Measurementsmentioning

confidence: 99%

Study of Elastomeric Heat Shielding Materials for Solid Rocket Motor Insulation

Mosa

Kotb

Fouda

et al. 2022

J. Phys.: Conf. Ser.

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“…Aramid pulp (AP) is one of the application forms of the aramid fiber (AF). [1][2][3] As a kind of fibrillated highperformance fiber, AP has been widely used in various fields, including specialty paper, [4,5] seals, [6,7] thermal insulators [8,9] and friction materials [10][11][12] thanks to its excellent tensile performances, outstanding thermal endurance, chemical stability and resistance to abrasion. When used as a reinforcement in composites, AP has great advantage of connecting with the matrix due to the large surface area.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of the aramid pulp/nitrile butadiene rubber composites with compatibilization of ionic liquids

et al. 2023

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To improve the uniformity and the mechanical/wear performances of the aramid pulp (AP)/nitrile butadiene rubber (NBR) composites, two types of ionic liquids (ILs), that is, 1-carboxymethyl-3-methylimidazolium chloride ([CmMIM]Cl) and 1-allyl-3-vinylimidazolium chloride ([AVIM]Cl) were applied on the AP surface, respectively. The ILs partially disrupted the hydrogen-bonds between the aramid chains to mitigate the fiber entanglement, and connected the AP to the rubber matrix by hydrogen-bond interaction or the crosslinking reaction during the vulcanization. The test results showed that, the IL treatments effectively improved the tensile and tear strengths without obviously affecting the physical characteristics of the composites. The wear properties of the AP/NBR composites also improved due to the enhancements of the tear strength and the connection between the AP and NBR matrix. Compared to the [CmMIM]Cl, the [AVIM]Cl was more efficient to improve the properties attributed to its better compatibilization for the AP/NBR system. For example, the specific wear rate under 20-N load of the composite with 15-phr [AVIM]Cl-AP was 1.1 Â 10 À7 mm 3 N À1 mm À1 , which was approximately 25% and 35% lower than that of the composites reinforced with 15-phr [CmMIM]Cl-AP and untreated AP, respectively.

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“…The highly fibrillated AF, also known as aramid pulp, has been widely applied instead of the untreated short AF. [27][28][29][30][31] Yuan et al 27 introduced aramid pulp into the nitrile rubber (NBR) composites to prepare the damping material, and concluded that the aramid pulp could significantly improve the tensile strength. The tensile strength of the composite with 50-phr aramid pulp was more than 70% higher than that of the composite without aramid pulp.…”

Section: Introductionmentioning

confidence: 99%

“…From this perspective, the fibrillated AF is one of the good alternatives since it can be well connected with the rubber matrix through mechanical anchoring. The highly fibrillated AF, also known as aramid pulp, has been widely applied instead of the untreated short AF 27–31 . Yuan et al 27 introduced aramid pulp into the nitrile rubber (NBR) composites to prepare the damping material, and concluded that the aramid pulp could significantly improve the tensile strength.…”

Section: Introductionmentioning

confidence: 99%

“…The tensile strength of the composite with 50‐phr aramid pulp was more than 70% higher than that of the composite without aramid pulp. Enew et al 28 compared the effects of aramid pulp, carbon mono fiber, and nano‐carbon black on the mechanical properties of the ethylene propylene diene monomer (EPDM) rubber for the thermal insulators for solid rocket motors application. Aramid pulp was approved to be most effective in improving the storage modulus and tensile strength.…”

Section: Introductionmentioning

confidence: 99%

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Influences of fiber fibrillation degree on mechanical and tribological performances of aramid fiber/nitrile rubber composites

Zhang

Yuan

et al. 2022

J of Applied Polymer Sci

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Three types of aramid fibers (AFs) with various surface fibrillation degrees were introduced into nitrile rubber (NBR) matrix to prepare the AF/NBR composites, respectively. Their impacts on the mechanical and tribological performances of the NBR composites were mainly studied. The results showed that, as the fiber content increased, the tensile strength of the AF/NBR composites increased after initially decreased, and the turning point moved toward the direction of lower AF content with the fiber fibrillation degree increase. In

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Effect of aramid and carbon fibers with nano carbon particles on the mechanical properties of EPDM rubber thermal insulators for solid rocket motors application

Cited by 13 publications

References 8 publications

Study of Elastomeric Heat Shielding Materials for Solid Rocket Motor Insulation

Study of Elastomeric Heat Shielding Materials for Solid Rocket Motor Insulation

Preparation and properties of the aramid pulp/nitrile butadiene rubber composites with compatibilization of ionic liquids

Influences of fiber fibrillation degree on mechanical and tribological performances of aramid fiber/nitrile rubber composites

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