In this work we have prepared and compared the thermal and mechanical properties of aliphatic polyesters made from aliphatic diacids with different polymethylene chain lengths (2, 4, 6, 8) and three bicyclic sugar derived diols namely, dianhydro-1,4:3,6-D-glucitol (also known as isosorbide, Is), and two bicyclic diazetalized hexitols, 2,4:3,5-di-O-methylene- D-mannitol (Manx-diol) and -D-glucitol (Glux-diol) derived from D-mannose and D-glucose respectively (Fig. 1)