Sample | Time | Stretching vibrations of C = O and C = C groups |
---|---|---|
1 | 5 min reflux | 1787 – 1767 cm-1 stretching vibration -C = O bonds (BPO) 1660 – 1740 cm-1 stretching vibration -C = O bonds, type 1 (MMA) 1655 – 1750 cm-1 stretching vibration -C = O bonds, type 2 (propionate) 1633 cm-1 stretching vibration -C = C- bonds |
2 | 10Â min reflux | |
3 | 15Â min reflux | |
4 | 20Â min reflux | |
5 | 25Â min reflux | |
6 | 35Â min reflux |