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Synthesis Of Aa-G-Poly Lab Report

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The synthesis of Aa-g-poly(MAA) involve the optimization of various reaction conditions like initiator concentration, monomer concentration, crosslinker concentration, solvent concentration and pH. After the optimization of various reaction parameters the replications were carried-out in triplicates for the reproducibility of the results and statistical of the results obtained. It was performed using the Statistical Package for Social Science (SPSS) version 10. Statistical results of the optimum percent swelling are depicted in Table 1. The optimized parameters are explained as follow:
1. Effect of initiator concentration:
The effect of initiator concentration on the grafting efficiency of synthesized hydrogel is shown in Figures 1. It is …show more content…
Effect of solvent concentration: The grafting reactions were carried out using different volume of solvent. The double distilled water is used as a solvent for the reaction as presented in the figure-2. The effect of solvent on the grafting efficiency has been investigated in the range of 6ml to 14ml keeping the other variables constant. The grafting efficiency increases with increases in solvent concentration at first and thereafter the grafting yield decreases with increase in the amount of solvent. The decrease in percentage grafting is probably occurs due to the dilution of reaction medium due to excess of solvent …show more content…
MBA is used as a crosslinker for reaction. At lower crosslinker concentration, the gel may have less crosslinking and hence higher swelling capacity. Whereas the gel formed with high crosslinker concentrations will possess higher crosslinking density causing decrease in the distance between the crosslink points lowering the swelling capacity [13]. From the figure 5 we observed maximum percentage grafting at 0.0324 mol/L with maximum percentage swelling. Further increase in MBA leads to rigidness in hydrogel during reaction time and decreases the chance of grafting also, hence less percentage grafting reported

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