1, Yonsei University, Seoul, SE, Korea (the Republic of)
Valerolactone is a biomass material that can be obtained through catalysis from mevalonic acid obtained by fermentation of glucose. It is used as an environmentally friendly application material and it also can be applied as powder coating material without organic solvent. In order to use valerolactone as a coating material, it is necessary to polymerize by ring opening transesterification polymerization (ROTEP) reaction, and it have to be optimized according to the type, amount of catalyst and reactant conditions. As a result, ROTEP polymer was successfully synthesized using valerolactone using 0.75 wt% TBD catalyst. The result is 30,000 g/mol, Mw and PDI = 1.2 confirmed by GPC. Furthermore, we also discussed the application of additional functional groups to enhance the biomass ratio. After replacing the terminal of the polymerized polymer with hydroxyl groups, molecular weight could increase with biobased content. The synthesized compounds were applied to coating material as the powder form.