作者单位:Univ Fed Rio de Janeiro, Bss24, BR-21941902 Rio De Janeiro, RJ, Brazil[1]Brazilian Natl Inst Metrol Qual & Technol INMETRO, Lab Macromol LAMAC DIMAV, Rio De Janeiro, RJ[2]UFRRJ, Inst Exact Sci, Dept Chem, Seropedica, RJ, Brazil[3]Fed Inst Sci & Technol Rio Janeiro IFRJ, Rio De Janeiro, RJ, Brazil[4]