993 resultados para IRRADIATED POLYAMIDE-1010
Resumo:
May 1, 1959.
Resumo:
"January 1960."
Resumo:
"October 1961."
Resumo:
"Chemistry--Separation process for plutonium and uranium."
Resumo:
"Chemistry--Separation process for plutonium and uranium."
Resumo:
"December 1984."
Resumo:
"21 May 1973."
Resumo:
"March 1973."
Resumo:
"Reprint which includes current pages from changes 1 and 2"--Cover.
Resumo:
The radiation chemistry of poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) with a TFE mole fraction of 0.90 has been studied under vacuum using Co-60 gamma-radiation over a range of temperatures and absorbed doses. The radiolysis temperatures were 300, 363, 423, 523 and 543 K. New structure formation in the copolymers was analysed by solid-state F-19 NMR spectroscopy. The new structures formed in the copolymers have been identified and the G-values for the formation of new chemical structures have been investigated at 363 and 523 K. These two temperatures are just above and just below the polymer T-g and T-m, respectively. At the lower temperature, there was no evidence for any chain branching and an estimate of G(S) of 1.0 was obtained. A value of G(S) of 1.3 and a minimum value of G(X)(Y) of 1.3 were obtained at 523 K. (C) 2003 Society of Chemical Industry.