Overall, OLE exhibited greater antioxidant activity than OFE, even BPOL and BPOF.
The relationships between phenolic compound structures and antioxidant activities were explored through DPPH radical scavenging capacity assays and the FRAP method.
The number and location of hydroxyl groups in the phenolic compounds greatly influenced their antioxidant function, and compounds with a catechin moiety exhibited greater antioxidant capabilities. The performance was also enhanced if the 4-position was bound to double bonds in electrondonating groups. Mixtures of different phenolic compounds had greater antioxidant activities than individual compounds due Financial support was provided by the funding system for National science and technology support plan items which was named “Key technology and demonstration on preparation of plasticizer with oil turpentine group.