Kinetic Analysis of the Decomposition of Chelates of Di-alkyldithiocarbamate of Cd(II) |
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| Authors: | A Gouveia Souza M C Nóbrega Machado L Helker-Carvalho M F Severo Trindade |
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| Institution: | (1) Departamento de Química, CCEN, Universidade Federal da Paraíba, 58059-900, Joăo Pessoa, Paraíba, Brazil;(2) Departamento de Química, CCT, Universidade Estadual da Paraíba, Campina Grande, Paraíba, Brazil;(3) Departamento de Materiais, CCT, Universidade Federal da Paraíba, Campina Grande, Paraíba, Brazil |
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| Abstract: | The thermal decomposition kinetics of the solid complexes Cd(S2 CNR2 )2 , where R =C2 H5 , n -C3 H7 , n -C4 H9 or iso -C4 H9 , was studied by using isothermal and non-isothermal thermogravimetry. The superimposed TG/DTG/DSC curves revealed that thermal
decomposition reactions occur in the liquid phase. The kinetic model that best fitted the experimental isothermal TG data
was the one-dimensional phase-boundary reaction-controlled process R1 . The thermal analysis data suggested the thermal stability sequence Cd(S2 CNBun
2 )2 >Cd(S2 CNPrn
2 )2 >Cd(S2 CNBui
2 )2 >Cd(S2 CNEt2 )2 , which accords with the sequence of stability of the apparent activation energies.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | cadmium dialkyldithiocarbamate kinetics thermal decomposition thermogravimetry |
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