Výsledky vyhledávání - "Jess M. Waller"

Use of helical parameters to generate candidate conformations for crystal packing: illustrative application to a polyimide

Autor: Ronald K. Eby, Jess M. Waller

Publikováno v: Polymer. 33:5334-5337

This communication describes the application and extension of a method for calculating the helical parameters with which to describe molecular conformations. The method, which was originally developed by Shimanouchi and others, is applied to a polyim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::701248464edffbc02ec8fba081d89da7
https://doi.org/10.1016/0032-3861(92)90822-e

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Comparison of the Dimensional Stability of Kel-F 81 and Neoflon CTFE M400H Polychlorotrifluoroethylenes Used in Valve Seat Applications

Autor: Joseph Fries, Barry Newton, Jess M. Waller, Harold D. Beeson

The dimensional stability of polychlorotrifluoroethylene (PCTFE) valve seats used in oxygen regulator applications was determined by thermomechanical analysis (TMA). Two traceable grades of PCTFE were tested; Kel-F 81 and Neoflon CTFE M400H. For thes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84e41c1c271a485867a288ef30e383e3
https://doi.org/10.1520/stp12485s

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Sensitive Procedures for Determining the Permeation Resistance of Chlorinated Polyethylene Against Liquid Propellants

Autor: James H. Williams, Jess M. Waller, Joseph Fries

The permeation resistance of chlorinated polyethylene (CPE) used in totally encapsulating chemical protective suits against the aerospace fuels hydrazine, monomethylhydrazine, and uns-dimethylhydrazine was determined by measuring the breakthrough tim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db5b07ef0d52fd3b8bf784631103d3dc
https://doi.org/10.1520/stp14461s

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Polymer-Oxygen Compatibility Testing: Effect of Oxygen Aging on Ignition and Combustion Properties

Autor: Jess M. Waller, Joseph Fries, D. Bruce Wilson, Jon P. Haas

The oxygen compatibility of six polymers used in oxygen service was evaluated after exposure for 48 hours to oxygen pressures ranging from 350 to 6200 kPa (50 to 900 psia), and temperatures ranging from 50 to 250 C (122 to 302 F). Three elastomers we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a0640f395963a0dfc81bf5fd07692147
https://doi.org/10.1520/stp12488s

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Effect of Molding and Machining on Neoflon CTFE M400H Polychlorotrifluoroethylene Rod Stock and Valve Seat Properties

Autor: Barry Newton, Jess M. Waller, Harold D. Beeson

Since 1997 numerous fires have been reported to the Food and Drug Administration involving cylinder valves installed on medical use oxygen cylinders sold and operated within the United States. All of the cylinder valves in question had polychlorotrif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::653752319996a4ee7a755c654fb16c77
https://doi.org/10.1520/stp11601s

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Causes and Mitigation of Fuel Valve Pilot Seal Extrusion in Space Shuttle Orbiter Primary RCS Thrusters

Autor: T. Kelly, Brad Forsyth, T. Roth, Regor Saulsberry, W. Haney, Jess M. Waller

Publikováno v: 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.

Extrusion of a polytetrafluoroethylene (PTFE) pilot seal located in the Space Shuttle Orbiter Primary Reaction Control Subsystem (PRCS) thruster fuel valve has been implicated in 68 ground and on-orbit fuel valve failures. A rash of six extrusion-rel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c8e6a17ec888141e0b5f5504c17d203
https://doi.org/10.2514/6.2004-4149

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Factors contributing to pilot valve fuel seal extrusion in orbiter PRCS thrusters

Autor: Regor Saulsberry, John D. Albright, Jess M. Waller

Publikováno v: 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.

Extrusion of the polytetrafluoroethylene (PTFE) pilot seal used in the monomethylhydrazine (fuel) valve of the Orbiter Primary Reaction Control System (PRCS) thrusters has been implicated in numerous on-orbit thruster failures and on-ground valve fai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e8ec7201bdee06133117db40ac858c5
https://doi.org/10.2514/6.2000-3549

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Proactive Mitigation of PCTFE-Related Ignition Hazards in Oxygen Systems: I. Development of a Voluntary Consensus Standard Specification to Control Property Variation in Finished PCTFE Parts

Autor: HD Beeson, HL Julien, Barry Newton, Jess M. Waller

Publikováno v: Journal of ASTM International. 3:13567

Revelations of dimensional instability in polychlorotrifluoroethylene (PCTFE) semifinished articles and finished parts raised concerns that leaks or part failure could occur during service, leading to catastrophic component or system failure, especia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45975dbcb36038f3e483b552eeb7be86
https://doi.org/10.1520/jai13567

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Proactive Mitigation of PCTFE-Related Ignition Hazards in Oxygen Systems: II. Testing of Inventoried 'At-Risk' PCTFE Parts and Hazard Analyses of Corresponding Ground Service Equipment at the Kennedy Space Center

Autor: PD Faughnan, AR Staveland, Harold Beeson, FY Hshieh, Sarah Smith, Barry Newton, KA Murray, TD Gallus, Jess M. Waller, D Tyre

Publikováno v: Journal of ASTM International. 3:13568

Revelations of excessive property variation in polychlorotrifluoroethylene (PCTFE) semifinished and finished parts led to concerns that leaks or part failure could occur in service, possibly leading to catastrophic component or system failure by flow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c84186a1457f264e1828cac223d6b5cf
https://doi.org/10.1520/jai13568

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