Effect of Carbon Black on Characteristics of a Selected EPDM-Based Thermal Insulator Composite

Mohamed, Mahmood; El-Marsafy, S. M.; Hasanin, Saeed; Wafy, Tamer Z.

doi:10.21608/ejmtc.2017.21272

Cited by 2 publications

(1 citation statement)

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“…EPDM is a kind of rubber filled with precipitated silica and organic fiber, which is vulcanized by peroxide. The vulcanizing condition of the two kinds of insulation specimen is determined as follows: the molding temperature is 160 ℃, the molding pressure is 10 MPa, and the molding time is 40 min [9]. The solid content of HTPB propellant (the sum of AP, Al and RDX) is 88% cured by isophorone diiscyanate (IPDI) [10].…”

Section: Methodsmentioning

confidence: 99%

Effect of Insulation Layer Composite and Water Adsorption on Bonding Performance in Heat Barriers

Awad

Nasser

2020

Adv. J. Chem. A

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Thermal insulation layer in solid rocket motors is a vital component during the rocket flight. Many factors can affect the performance of this insulation layer. Bonding property between rocket propellant and the thermal insulation layer are examined in this study. Hydroxyl terminated polybutadiene (HTPB) and isophorone diisocyanate (IPDI) as a curative was chosen as the most common type of rocket propellant. The effect of two types of polymeric insulation layer such as nitrile butadiene rubber (NBR) and ethylene-propylene-diene monomer (EPDM), on the bonding performance at the interface between (HTPB/IPDI) propellant and the respective insulation layer has been investigated. Results revealed that both types of insulation layer considerably decreased the interfacial bonding performance of the (HTPB/IPDI) propellant. NBR was proven to be more severe on weakening the adhesion strength than that of the EPDM. We further investigated the effects of the thickness and water content of NBR on the bonding performance, and proved that bonding strength was inversely proportional to the thickness and the water content.

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Section: Methodsmentioning

confidence: 99%