(Hwaseong-City, Gyeonggi-Do, Korea). The transesterification
reaction of the treated LGPO was performed using 1 wt% KOH
dissolved in methanol (10:1 M ratio) for a 60 min reaction time
and at 60 8C reaction temperature. After each experiment, the
reaction was stopped at a specified time, and the reaction
mixture was allowed to settle in a separating funnel for 2 h. The
final product was purified and characterized according to EN
14214 and ASTM D6751.