Elastomers Resistant to Rocket Propellants

Abstract Resistance of polymers to hydrazine-type fuels, Hybaline A-5, nitrogen tetroxide, and fluorine-containing oxidizers was investigated. Elastomers found suitable for application in hydrazine-type fuels and Hybaline A-5 environments are butyl and ethylene propylene rubbers. Carboxy-nitroso rubber is recommended for long term exposure to nitrogen tetroxide at 165° F while resin-cured butyl rubber is satisfactory for limited application. Fluorocarbon plastics and silicone rubber are most suitable for use with oxygen difluoride, and Teflon, polyethylene, and ethylene propylene rubber with a perchloryl fluoride-tetrafluorohydrazine mixture. Chlorine trifluoride is a very reactive oxidizer and Teflon, Kel-F 81, and uncured nitroso rubber gum are suitable only for limited application.

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Effect of long‐term fluorination on surface electrical performance of ethylene propylene rubber

High Voltage ◽

10.1049/hve.2019.0005 ◽

2019 ◽

Vol 4 (4) ◽

pp. 339-344 ◽

Cited By ~ 8

Author(s):

Rujia Men ◽

Zhipeng Lei ◽

Tao Han ◽

Davide Fabiani ◽

Chuanyang Li ◽

...

Keyword(s):

Electrical Performance ◽

Ethylene Propylene ◽

Ethylene Propylene Rubber

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Effect of Liquid Rocket Fuels and Oxidizers on Elastomeric O-Ring Seals

Rubber Chemistry and Technology ◽

10.5254/1.3547130 ◽

1966 ◽

Vol 39 (4) ◽

pp. 1215-1221

Author(s):

C. L. Bellanca ◽

I. O. Salyer

Keyword(s):

Hydrogen Peroxide ◽

Elevated Temperature ◽

Nitrogen Tetroxide ◽

Ethylene Propylene ◽

Long Term Storage ◽

Elastomeric Materials ◽

End Use ◽

Liquid Rocket ◽

Term Storage

Abstract O-ring seals of selected elastomeric and compliant materials were evaluated for resistance to liquid rocket fuels and oxidizers in a simulated end-use test. Oxidizers were nitrogen tetroxide, chlorine trifluoride, and 90 per cent hydrogen peroxide; fuels were mixed hydrazines, pentaborane, and Hybaline A-5. Tests were made at 73° F with all fluids; further, the effect of elevated temperature (160° F) on seals was evaluated in nitrogen tetroxide, hydrogen peroxide, and mixed hydrazines. At 73° F only polytetrafluoroethylene was resistant to all of the fluids; however, elastomeric materials were found which were satisfactory for specific fuel or oxidizer systems. Butyl and ethylene propylene rubber appear satisfactory for long term storage in the presence of mixed hydrazines and Hybaline A-5. The fluorocarbons appeared best of the elastomeric materials for use with pentaborane and hydrogen peroxide.

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Biomedical Materials to Repair Retinal Detachments

MRS Proceedings ◽

10.1557/proc-55-55 ◽

1985 ◽

Vol 55 ◽

Author(s):

Miguel F. Refojo

Keyword(s):

Retinal Detachment ◽

Silicone Rubber ◽

Methyl Acrylate ◽

Silicone Oil ◽

Vitreous Body ◽

Light Sensitivity ◽

Scleral Buckling ◽

Intraocular Injection ◽

Other Substances

ABSTRACTImplants are essential for the repair of retinal detachments. The implant buckles the wall of the eye and apposes the detached retina with the choroid, thus restoring light sensitivity to the retina. The scleral buckling also relieves traction on the retina from a shrinking vitreous body. The implant materials most commonly used are solid silicone rubber and silicone sponges, but both types have some disadvantages. A poly(hydroxyethyl acrylate-co-methyl acrylate) hydrogel implant with improved properties of softness and antibiotic absorption is also available for retinal detachment surgery. Proliferative vitreoretinopathy involves various conditions of retinal detachment complicated by vitreous fibrosis, which, after vitrectomy, may be treated with intraocular injection of fluids that support the retina against the choroid. For conditions requiring a long-term implant, silicone oil although controversial is the material of choice. Many other substances have been investigated but none better has yet been found.

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