The results showed that the anisotropy of the GCAWs depends on the coupling of magnetostriction and internal stresses, and can be tailored by varying the ratio of the glass coating layer thickness to the metal core radius because the ratio characterizes the stress in the ferromagnetic core. The larger the ratio, the smaller the angle between the easy axis of anisotropy and the circumferential direction. The results further showed that for a GCAW wire originally with helical anisotropy, shortening the length of the wire below a critical value 10 mm will change the anisotropy
from helical to circumferential, because the wire end domains form circumferential anisotropy. (C) 2011 American Institute of Physics. [doi:10.1063/1.3556684]“
“We report a three-step preparation find more of a polymer-supported oxidizing reagent, polyethylene-g-N-bromosuccinimide (PE-g-NBS), through the graft copolymerization of maleic anhydride (MAn) onto polyethylene (PE) by a photochemical method with 1% benzophenone as a photosensitizer.
The postgrafting treatment of polyethylene-g-maleic anhydride (PE-g-MAn) with urea on fusion gives polyethylene-g-succinimide (PE-g-succinimide), which, on further treatment selleck chemicals with an aqueous solution of sodium hydroxide and bromine, gives the required reagent, PE-g-NBS. The maximum percentage grafting (25%) was obtained with 3.57 mol of MAn and 0.5 mL of 1% benzophenone in 120 min. Fourier transform infrared spectroscopy and thermogravimetric analysis methods were used to characterize the graft copolymer PE-g-MAn, PE-g-succinimide, and the polymeric support, that is, PE-g-NBS. Transferase inhibitor The grafted PE and the polymeric support were found to be thermally stable. The polymer-supported N-bromosuccinimide was used successfully for the efficient oxidation of a series of alcohols, including 2-propanol, n-butanol, ethylene glycol, cyclohexanol,
poly(vinyl alcohol), benzoin, benzyl alcohol, and chloromycetin, to their corresponding aldehydes and ketones. The selectivity of PE-g-NBS toward the oxidation of secondary alcoholic groups without the disturbance of the primary alcoholic groups was reflected during the oxidation of chloromycetin. The oxidized products were characterized by Fourier transform infrared and (1)H-NMR spectral methods. The reagent was reused for the oxidation of fresh alcohols, and it was found to oxidize them successfully, although with a little lower product yield. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 2584-2590, 2011″
“In this study, the magnetic properties and crystalline behavior of Fe(84-x)B(10)C(6)Cu(x) (x – 0-1.3) alloys prepared by annealing the melt-spun ribbon have been investigated.