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- W2581335827 abstract "The copolymer (2, 2’-HBDF) synthesized by the condensation of 2, 2’-dihydroxybiphenyl (2, 2’- HB) and dithiooxamide (D) with formaldehyde (F) in the presence of acid catalyst and using 1:1:2 molar proportions of the reacting monomers. The copolymer possesses antimicrobial activity for certain bacteria such as Staphylococcus aureus, Escherichia coli, and fungi Aspergillus niger, Candida albicans. The thermogravimetric analysis of copolymer resin prepared in present study has been carried out by non-isothermal thermogravimetric analysis technique in which sample is subjected to condition of continuous increase in temperature at linear rate. Thermal study of the resin was carried out to determine its mode of decomposition and relative thermal stabilities. The Freeman-Carroll and Sharp-Wentworth methods have been used in the present investigation to calculate thermal activation energy and different kinetic parameter of the copolymer resins. The advantage of Freeman-Carroll method is to calculate both the order of reaction (n) and energy of activation in one single stage by keeping heating rate constant. By using data of thermogravimetric analysis, various thermogravimetric parameters like frequency factor (Z), entropy change (S), free energy change (F) and apparent entropy (S*) have been determined using Freeman-Carroll method." @default.
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- W2581335827 date "2011-01-01" @default.
- W2581335827 modified "2023-09-27" @default.
- W2581335827 title "Antimicrobial activity and thermal properties of copolymer resin derived from 2, 2'-dihydroxybiphenyl, dithiooxamide and formaldehyde" @default.
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