Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Galen R. Hatfield"'
Autor:
Galen R. Hatfield
Publikováno v:
Research-Technology Management. 45:41-47
The valuation of R&D has been the subject of numerous publications (1) and recently, a comprehensive book by F. Peter Boer (2). Most of these publications use a variety of financial metrics such as net present value and return on investment. Some als
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21d722d2f152dbdf978593a8e0117d80
https://doi.org/10.1080/08956308.2002.11671481
https://doi.org/10.1080/08956308.2002.11671481
Publikováno v:
Analytical Chemistry. 71:866-872
Rapid microanalysis of a wide variety of polyolefins was performed using pyrolysis-photoionization mass spectrometry (py-PI-MS). Solid samples (∼10 μg) were pyrolyzed on a heated probe in the source region of a time-of-flight mass spectrometer. Py
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d800dd2042cb249e371fa898cf1f1b5
https://doi.org/10.1021/ac9807159
https://doi.org/10.1021/ac9807159
Publikováno v:
Analytical Chemistry. 67:3082-3085
Melt-state 13 C NMR with magic angle spinning and dipolar decoupling is presented as an attractive method for the determination of comonomer type and content in polyolefins. The primary advantages of this approach are a decrease in analysis time and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c5f5c42e22a588fa556e7b4908f77f7
https://doi.org/10.1021/ac00113a052
https://doi.org/10.1021/ac00113a052
Publikováno v:
Polymer. 35:3943-3947
The crystalline polyamide phase in two representative poly(ether-block-amide) copolymers has been shown to be polymorphic in nature via an analysis by X-ray diffraction and solid-state 13C nuclear magnetic resonance. In both polymers, this phase was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e79bf8610f948c7f3bc79b3049a743c
https://doi.org/10.1016/0032-3861(94)90279-8
https://doi.org/10.1016/0032-3861(94)90279-8
Publikováno v:
Macromolecules. 26:6350-6353
XRD, NMR, and DSC results indicate that both block poly(ethylene oxide-co-nylon 6) and poly(ethylene oxide-co-nylon 12) are separated, multiphase systems that include a well-defined polyamide crystalline phase, a polyamide amorphous phase, and a pred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::162aefeb49c547e1544c53f08b163ee9
https://doi.org/10.1021/ma00076a008
https://doi.org/10.1021/ma00076a008
Autor:
Gordon C. Campbell, Jeffery L. White, Nick C. Elbaum, Galen R. Hatfield, James F. Haw, Richard C. Crosby, Sharon A. Taylor
Publikováno v:
Macromolecules. 25:3369-3376
Solid-state NMR spectroscopy was used to investigate the morphology and molecular dynamics of polyBIS(3-methylphenoxy)phosphazenel-PB3MP, a representative semicrystalline polyphosphazene. Variable temperature 31P magic-angle spinning (MAS) NMR spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e85cb690aa66219ce5e9c8b0a62c146
https://doi.org/10.1021/ma00039a009
https://doi.org/10.1021/ma00039a009
Publikováno v:
Journal of Magnetic Resonance (1969). 94:535-542
29Si high-resolution solid-state NMR spectra of the α and β forms of silicon nitride show the effect of residual dipolar coupling to 14N nuclei which is not averaged out by fast magic-angle sample spinning. The influence of 14N is most noticeable i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fd6bf32c8e4b53f6fbd627d76349887
https://doi.org/10.1016/0022-2364(91)90139-k
https://doi.org/10.1016/0022-2364(91)90139-k
Publikováno v:
Journal of the American Chemical Society. 112:4676-4679
Fine structure in the {sup 29}Si MAS NMR spectra of Si{sub 3}N{sub 4} has been observed, prompting a reevaluation of the current interpretation of Si{sub 3}N{sub 4} spectra. On the basis of variable field studies, this fine structure indicates the pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a1514ce01d215c8152451089172fd41
https://doi.org/10.1021/ja00168a008
https://doi.org/10.1021/ja00168a008
Publikováno v:
Macromolecules. 23:1342-1346
Les variations observees dans le spectre RMN 13 C et 15 N apres traitement par KI/I 2 montrent que les liaisons hydrogene entre chaines dans le complexe sont faibles ou absentes et qu'il y a des variations de conformation des groupes methylene adjace
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa385a6f806a61027c4932f0ae13b980
https://doi.org/10.1021/ma00207a018
https://doi.org/10.1021/ma00207a018
Publikováno v:
Macromolecules. 23:1330-1342
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::012d994deb4ee9585f0c8ee3d65056c6
https://doi.org/10.1021/ma00207a017
https://doi.org/10.1021/ma00207a017