Effect of the radiolitic sterilization in polyethylene/starch blends
AUTOR(ES)
Ferreira, Flávia Gonçalves Domingues, Lima, Maria Alice Gomes de Andrade, Almeida, Yêda Medeiros Bastos de, Vinhas, Glória Maria
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2008
RESUMO
Samples of LDPE/modified starch blends 80/20 m/m before and after exposure to gamma rays were examined by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction. The effect of gamma radiation is clearly seen in the samples irradiated at a dose of 25 kGy. The main alteration in the polymeric material after exposure at the radiation range was a decrease in the mechanical properties, alterations in the chemical structure of the blend with an increase in the carbonyl and vinyl indices and the appearance of new crystalline symmetry generating a crystalline domain not existing before in the blend.
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