Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Myong K. Ahn"'
Publikováno v:
Propellants, Explosives, Pyrotechnics. 32:117-126
Nitrocellulose based (NC) and nitroglycerin based (NG) propellants often have a fixed acid and water content during the manufacturing time. After manufacture, the quantity and ratio of acid/water will continue to vary depending upon the conditions of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d2e4cde6f994ecfec92d70919fd7659
https://doi.org/10.1002/prep.200700013
https://doi.org/10.1002/prep.200700013
Publikováno v:
Macromolecules. 30:8318-8321
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08a96a5505fd5d6ac8db04a04590ea75
https://doi.org/10.1021/ma970580t
https://doi.org/10.1021/ma970580t
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 31:831-841
PMR-15 is a high-performance thermoset polyimide resin that is used in many high-temperature applications. Postcured PMR-15 produces room-temperature electron paramagnetic resonance (EPR) spectra from stable freeradical species that are formed during
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c4f517ed546e91a024e3359344d9cb7
https://doi.org/10.1002/polb.1993.090310711
https://doi.org/10.1002/polb.1993.090310711
Autor:
Wiley J. Youngs, John F. Waters, Luke A. Burke, Mary Ann B. Meador, Vance O. Kennedy, James K. Sutter, Chaim N. Sukenik, Mordechai Livneh, Myong K. Ahn
Publikováno v:
Macromolecules. 25:3868-3873
Methoxycarbonyl bridgehead substituted nadic diacid monomethyl ester, when used as an endcapping monomer, lowered the cure temperature of thermoset PMR polyimides without seriously affecting other desirable properties, such as glass transition temper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a756826298ebbb7d0d513acad83ccf7
https://doi.org/10.1021/ma00041a007
https://doi.org/10.1021/ma00041a007
Autor:
Myong K. Ahn, Lennox E. Iton
Publikováno v:
The Journal of Physical Chemistry. 95:4496-4500
{sup 133}Cs NMR spectra show marked changes in the line shape as a function of temperature for a fully hydrated zeolite. A sample containing a mixture of Li{sup +}, Na{sup +}, and Cs{sup +} ions. A single Lorentzian peak is observed at temperature ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9722c2243baadd34eec94dc32d1115d
https://doi.org/10.1021/j100164a059
https://doi.org/10.1021/j100164a059
Publikováno v:
Macromolecules. 28:7026-7028
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3db514a56a578ca0bb2d353544579b4b
https://doi.org/10.1021/ma00124a047
https://doi.org/10.1021/ma00124a047
Publikováno v:
MRS Proceedings. 305
Polyimide resins are used as matrix materials in fiber reinforced composites. Such composites are lightweight, have relatively high strength, and can be used at temperatures above 300°C. Postcured PMR-15 produces room temperature electron paramagnet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c234be67291ed88fec52e1384c487ec4
https://doi.org/10.1557/proc-305-217
https://doi.org/10.1557/proc-305-217
Autor:
Myong K. Ahn
Publikováno v:
Journal of the American Chemical Society. 118:4508-4508
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bc7f52c792a5e050faee1364f5ab952
https://doi.org/10.1021/ja955319b
https://doi.org/10.1021/ja955319b
Variable-temperature magic-angle-spinning technique for studies of mobile species in solid-state NMR
Publikováno v:
The Journal of Physical Chemistry. 93:5584-5587
We demonstrate the utility of variable-temperature (VT) magic-angle-spinning (MAS) Fourier transform nuclear magnetic resonance (FT-NMR) spectroscopy for the study of mobile species in solids, especially when quadrupolar nuclei are being observed. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8564fa91ad85c77aef586feaa1a93b7
https://doi.org/10.1021/j100351a051
https://doi.org/10.1021/j100351a051
Autor:
Lennox E. Iton, Myong K. Ahn
Publikováno v:
The Journal of Physical Chemistry. 93:4924-4927
Variable temperature Cs-133 NMR measurements have been made on hydrated Cs-exchanged Linde-4A zeolite containing 3.8 Cs/sup +/ ions per unit cell. At room temperature there is rapid site exchange of the Cs/sup +/ ions, so that the NMR spectrum is tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42759210b4375c4948d9af6f8c882e8b
https://doi.org/10.1021/j100349a049
https://doi.org/10.1021/j100349a049