Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Larry A. Simeral"'
Publikováno v:
Journal of the American Chemical Society. 128:16816-16826
MAO is the co-catalyst in metallocene catalytic systems, which are widely used in single-site olefin polymerization due to their high stereoselectivity. To date, the structures of the catalytically active compound or compounds in MAO have eluded rese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60be94be810a88157a94d31d7842327b
https://doi.org/10.1021/ja064545q
https://doi.org/10.1021/ja064545q
Autor:
Hua Jin, Xiaogang Xie, Leslie G. Butler, Gary R. Byerly, Clinton S. Willson, Riyadh I. Al-Raoush, Mark L. Rivers, Richard L. Kurtz, Larry S. Simeral, Kyungmin Ham
Publikováno v:
Chemistry of Materials. 16:4032-4042
Synchrotron X-ray tomography is used to image, at 3.34 μm resolution, a mixture containing high-impact polystyrene (HIPS) and a two-component flame retardant, a brominated phthalimide dimer (Saytex BT-93), and a synergist, antimony oxide (Sb 2 O 3 )
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4aa504fcd9e6f4378082bc22ff64fcc7
https://doi.org/10.1021/cm0350333
https://doi.org/10.1021/cm0350333
Publikováno v:
Analytical and Bioanalytical Chemistry. 378:1574-1578
DOSY has been extremely successful in many studies of molecular weight distributions, especially when the components are separable along the chemical shift axis. However, an unresolved NMR resonance yields the familiar problem of overlapping exponent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1eb93c079571f34158b0ff6538e8cb39
https://doi.org/10.1007/s00216-003-2457-1
https://doi.org/10.1007/s00216-003-2457-1
Autor:
Pamela L. Bryant, Larry S. Simeral, Frank R. Fronczek, Anthony A. Mrse, Leslie G. Butler, Youngil Lee
Publikováno v:
Chemistry of Materials. 10:1291-1300
The dispersion of brominated flame retardants in polymers is monitored with 81Br nuclear quadrupole resonance (NQR) using a pulse NQR spectrometer. The NQR spectrometer consists of a homemade 10−300 MHz single-channel NMR console coupled to a broad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09eed108fb8521737f19132a07f86006
https://doi.org/10.1021/cm970541w
https://doi.org/10.1021/cm970541w
Publikováno v:
Organometallics. 17:1941-1945
New methods for characterization of methylaluminoxanes (MAO) and determination of trimethylaluminum (TMA) using proton NMR are reported. Addition of excess perdeuteriotetrahydrofuran to sharpen and shift the TMA peak followed by curve fitting to remo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a43f35c624576eff9d8e6b437e07efee
https://doi.org/10.1021/om980046p
https://doi.org/10.1021/om980046p
Publikováno v:
SPIE Proceedings.
Synchrotron X-ray tomography offers many advantages for the study of flame retardants in polymer blends. The time to acquire the raw projection data is relatively short, the time required to reconstruct and view a 3D image is acceptable, and multiple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d66a51ebaae554b89308b3bd7ed2ff4
https://doi.org/10.1117/12.930193
https://doi.org/10.1117/12.930193
Autor:
Thierry M. Guihéneuf, Larry S. Simeral
Publikováno v:
Applied Spectroscopy. 55:1099-1101
The standard methods for elemental analysis of aluminum and sodium in zeolites typically require significant sample and reagent preparation before the final titrimetric or atomic spectroscopic measurement. Low-resolution, bench top nuclear magnetic r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a2d7d33c7545fea8f49ba08e334834a
https://doi.org/10.1366/0003702011953027
https://doi.org/10.1366/0003702011953027
Autor:
Anthony A. Mrse, Randall W. Hall, Jan L Eilertsen, Frank R. Fronczek, Feng-Jung Wu, Lacramioara Negureanu, Zhehong Gan, Leslie G. Butler, Larry S. Simeral
Publikováno v:
Inorganic chemistry. 46(1)
The first structurally characterized isobutyl-containing aluminoxane compound is presented. The Al10O6iBu16(mu-H)2 (I) cluster is produced from neat octakis-isobutyltetraluminoxane (Al4O2iBu8) at 80 degrees C in 6-8 h followed by slow crystallization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e1f5f36e3eced6cc656ebf04885125c
https://pubmed.ncbi.nlm.nih.gov/17198411
https://pubmed.ncbi.nlm.nih.gov/17198411
Autor:
Larry S. Simeral
Publikováno v:
Applied Spectroscopy. 51:1585-1587
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f87e87df222b302401b4b9e0521b0c64
https://doi.org/10.1366/0003702971939145
https://doi.org/10.1366/0003702971939145
Autor:
Larry S. Simeral
Publikováno v:
Applied Spectroscopy. 49:400-402
Proton nuclear magnetic resonance (NMR) is a useful tool to identify and to quantitate species in mixtures of organic chemicals. However, carbon-13 satellites often interfere with the identification and integration of resonances from species at low c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5da9baee3b158d133e9cd1a524f19af
https://doi.org/10.1366/0003702953963599
https://doi.org/10.1366/0003702953963599