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- W2184291800 abstract "The graft copolymerization ofacrylic acid onto caesarweedfibres initiated by Ceric ionithioacetamide redox pair in aqueous media has been investigated. Cede ionrthioacetamide redox pair was an effective initiator of the graft reaction in the temperature region of 30-60 °C. However, at 30 °C, the graft yields were generally low but increased with concentrations of cede ion, acrylic acid and thioacetamide with the highest value of 23% at 0 .97 M concentration of acrylic acid . The low graft yields, which are characteristic for acrylic acid, were associated with its solubility in the reaction media . The graft yield showed a linear relationship with acrylicacid concentration suggesting that the latter is non-terminating of the graft reaction. For thioacetamide, an optimum graft yield of 16% was found at its concentration of 18x10-4 M and thereafter decreased at higher concentrations. This was attributed to a pre- ponderance of termination reactions by thiol radicals at high concentrationsof the latter. The temperature dependenceof graft yield was investigated in the range 30-60 °C. The graft yield showed positive temperature dependence with calculated activationenergy of 6.11 kcalmort ." @default.
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- W2184291800 date "1998-01-01" @default.
- W2184291800 modified "2023-09-27" @default.
- W2184291800 title "Graft Copolymerization of Acrylic Acid onto Caesarweed Fibres by Ceric Ion/Thioacetamide Redox Pair" @default.
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