Bio-based estolide compositions

A composition comprising at least one compound having the formula:

• wherein:
• x is an integer from 1 to 11 and y is 14−(x+z), 16−(x+z), or 18−(x+z);
• z is 0 or 2, and if z is 2 there is a C═C double bond between the respective carbons;
• n is 0 or an integer from 1 to about 9;
• R is selected from the group consisting of:
• CHR1R2, a residual fragment of lesquerella oil, a residual fragment of castor oil, a residual fragment of erucic oil, or combinations thereof;
• R1 and R2 are independently selected from hydrogen and a saturated or unsaturated, branched or straight chain, and substituted or unsubstituted hydrocarbon chain of C-1 to C-36;
• and
• wherein the predominant species of secondary ester linkage is at the 9 position if z=0, x=6, and y=8;
• 10 position if z=0, x=7, and y=7;
• 12 position if z=2, x=7, and y=5 or z=0, x=9, and y=5;
• 13 position if z=0, x=10, and y=8;
• 14 position if z=2, x=9, and y=5 or z=0, x=11 and y=5.