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Abstract
The application of multi-site phase transfer catalyst (denoted herein as QX2) with water-soluble initiator for the radical polymerization of ethyl methacrylate (EMA) was explored. The radical polymerization of water-insoluble vinyl monomer (EMA), with water – soluble initiator (potassium peroxydisulphate PDS) and a multi-site phase transfer catalyst (1,4-bis tributyl methyl ammonium) benzene dichloride TBMABDC) were carried out in a water/cyclohexane two-phase system at constant temperature 60±1°C under nitrogen circumstances. The rate of polymerization (Rp) was determined as a function of various reaction parameters such as the concentration of monomer, initiator, catalyst and variation of the aqueous phase and organic solvents and temperature. Based on the experimental results, a suitable kinetic scheme and mechanism has been proposed for the polymerization reaction.
Notes
[EMA]: 2.0 mol · dm−3; [K2S2O8]: 2.0 × 10−2 mol · dm−3; [TBMABDC]: 2.0 × 10−2 mol · dm−3 [H+]: 0.5 mol · dm−3; [µ]: 0.2 mol · dm−3; Temp: 60±1°C.
[K2S2O8]: 2.0 × 10−2 mol · dm−3; [TBMABDC]: 2.0 × 10−2 mol · dm; [H+]: 0.5 mol · dm−3; [µ]: 0.2 mol · dm−3; Temp: 60±1°C.
[EMA]: 2.0 mol · dm−3; [TBMABDC]: 2.0 × 10−2 mol · dm−2; [H+]: 0.5 mol · dm−3; [µ]: 0.2 mol · dm−3; Temp: 60±1°C.
[EMA]: 2.5 mol · dm−3; [K2S2O8]: 2.0 × l0−2 mol · dm−3; [H+]: 0.5 mol · dm−3; [µ]: 0.2 mol · dm−3; Temp: 60±1°C.
[EMA]: 2.0 mol · dm−3; [K2S2O8]: 2.0 × 10−2 mol · dm−3; [TBMABDC]: 2.0 × 10−2 mol · dm−3 [H+]: 0.5 mol · dm−3; [µ] 0.2 mol · dm−3; [µ]: 0.2 mole dm−3.
[EMA]: 2.0 mol · dm−3; [K2S2O8]: 2.0 × 10−2 mol · dm−3; [TBMABDC]: 2.0 × 10−2mol · dm−3. [H+]: 0.5 mol · dm−3; [µ]: 0.2 mol · dm−3; Temp: 60±1°C.