Bonding a HTPB liner to modern rocket case materials

Sandén, Roland; Wingborg, Niklas

doi:10.1002/app.1989.070370112

Cited by 9 publications

(7 citation statements)

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“…Solid propellant rocket motors are insulated thin walled containers loaded with a solid propellant in which the most important ingredients are an oxidizer and a polymeric binder − The adhesive bonding between the propellant and the casing insulation is one major area of concern in the production and storability of such motors. − We have previously , investigated the diffusion of curing agents in the uncured propellant and in the insulation material in order to evaluate the effect of diffusion on the adhesion process. In addition to diffusion processes, the adhesion between the propellant and the casing insulation may be controlled by the surface energies of the materials in contact.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of EPDM Rubber by Plasma Treatment

Grythe

Hansen

2006

Langmuir

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The effect of argon, oxygen, and nitrogen plasma treatment of solvent cast EPDM rubber films has been investigated by means of atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and surface energy measurements. Plasma treatment leads to changes in the surface energy from 25 to 70 mN/m. Treatment conditions influenced both the changes in surface energy and the stability, and it became more difficult to obtain good contact angle measurements after longer (> ca. 4 min) treatment times, probably because of an increasingly uneven surface structure. XPS analyses revealed that up to 20 at. % oxygen can be easily incorporated and that variations of approximately 5% can be controlled by the plasma conditions. Oxygen was mainly found in hydroxyl groups, but also as carbonyl and carboxyl. XPS analyses showed more stable surfaces than expected from contact angles, probably because XPS analysis is less surface sensitive than contact angle measurements. AFM measurements revealed different surface structures with the three gases. The surface roughness increased generally with treatment time, and dramatic changes could be observed at longer times. At short times, surface energy changes were much faster than the changes in surface structure, showing that plasma treatment conditions can be utilized to tailor both surface energies and surface structure of EPDM rubber.

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Section: Introductionmentioning

confidence: 99%

Surface Modification of EPDM Rubber by Plasma Treatment

Grythe

Hansen

2006

Langmuir

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“…To provide good adhesion between those layers, the insulation surface is treated with a primer that is comparable with both the insulation and barrier material. The work of Sanden and Wingborg [38] shows that the strong adhesion of the liner to the case materials can be obtained with simple methods, such as light grinding and priming.…”

Section: Adhesion Enhancementmentioning

confidence: 99%

Review of the Adhesively Bonded Interface in a Solid Rocket Motor

Zhou

Chen

et al. 2015

The Journal of Adhesion

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One of the most challenging requirements in a solid rocket motor (SRM) is the integrity of the charge structure which is a multilayer adhesive joint involving the propellant, liner, and insulation. The propellant/liner/insulation interface is considered to be the weakest part of the whole structure. This interface has some of the usual features of an adhesively bonded interface, as well as its own special characteristics: the co-cured process, ingredient migration between interfaces, and complicated damage mechanisms. We give a technical and critical review of the past fifty years of existing research on many aspects of the propellant/liner/insulation interface in terms of the adhesive properties and adhesive mechanisms, ingredients migration, damage determination, and fracture analysis.To present a comprehensive outline of this interface we also clarify some remaining problems which should be addressed in the future. With significant improvements in the theoretical and experimental studies of the propellant/liner/insulation interface, the problem of integrity failure of the charge structure in SRM will be well resolved. Downloaded by [Cambridge University Library] at 07:15 14 August 2015 2

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“…Since then, still only a minor number of reports were published giving a general overview of HTPB properties [13][14][15][16] as far as our investigation has found. Other publications concentrated in particular aspects such as chemical modifications of HTPB [17,18] and its spe-cific role as binder in composite propellants [19][20][21][22], as a liner [23][24][25], and as thermal insulation [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Properties of Hydroxyl‐Terminal Polybutadiene (HTPB) and Its Use as a Liner and Binder for Composite Propellants: A Review of Recent Advances

Amado

Ross

Murakami

et al. 2022

Propellants Explo Pyrotec

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This paper reviews hydroxyl-terminal polybutadiene (HTPB) used as liner and binder for composite propellants, applied in rocket motors studied throughout the last decades, emphasizing the recent advances. The contribution aims to show the importance of HTPB in the propellant composition and on the liner coating of the rocket motor, which is in contact with the propellant grain. This paper also shows that many researchers have thoroughly studied several properties of HTPB, which are rele-vant to its role in liners and propellants. We have also reviewed analytical techniques such as Fourier Transform Infrared Spectroscopy (FTIR) as a characterization technique for HTPB and HTPB-based polyurethanes. Reflection and transfectants FTIR may be a future trend in studies about polymeric matrices for liners and propellants, and in the area of propellant formulations that use energetic binders, graphene and nanomaterials.

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Bonding a HTPB liner to modern rocket case materials

Cited by 9 publications

References 0 publications

Surface Modification of EPDM Rubber by Plasma Treatment

Surface Modification of EPDM Rubber by Plasma Treatment

Review of the Adhesively Bonded Interface in a Solid Rocket Motor

Properties of Hydroxyl‐Terminal Polybutadiene (HTPB) and Its Use as a Liner and Binder for Composite Propellants: A Review of Recent Advances

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