Polyester ethers derived from asymmetrical monomers based upon bisanhydrohexitols

An AB monomer, comprising bisanhydrohexitol derivatives capable of self-polymerization to form stereoregular or regioregular condensation polymer, wherein the AB monomer has the structure:

• A-X-C-Y-B
• wherein A is a carboxylic acid, an ester, or an acid chloride;
• Y is a bisanhydrohexitol unit derived from the group consisting of isosorbide, isoidide and isomannide;
• X is selected from the group consisting of:
• a. aromatic rings, including 1,4-phenylene, 1,3-phenylene, 2,6-naphthalene 2,7-naphthalene, and substituted derivatives thereof;
• b. heterocycles including, 2,5-furan, 2,5-thiophene, substituted 2,5-furan and substituted 2,5-thiophene;
• and
• c. saturated or unsaturated aliphatic chains;
• B is —OH;
• and
• C is selected from the group consisting of ether oxygen, a sulfide, and an amine, wherein the amine is NH or NR wherein R is C1 to C6, attaching X to Y;
• and
• wherein the AB monomer is at least about 98% pure endo-substituted bisanhydrohexitol derivative or an at least about 98% pure exo-substituted bisanhydrohexitol derivative.