In　this　article,　several　novel　polyesters　containing　renewable　2,6-pyridinedicarboxyl　aromatic　units　are　synthesized　by　direct　polycondensation.　The　obtained　polyesters　are　chemically　identified　by　Fourier　transform　infrared　and　proton　nuclear　magnetic　resonance.　Their　average　weight　molar　masses　vary　with　the　diol　chain　length,　from　Mw　=　2　600　g·mol−1　to　Mw　=　51　600　g·mol−1.　These　polyesters　exhibit　high　thermal　stability　with　thermaldegradation　temperatures　(Tmax)　ranging　from　330　to　399　°C.　Among　them,　the　polyesters　containing　bicyclic　diols　(isosorbide　IS　and　isomannide　IM)　are　amorphous　and　show　glass　transition　temperatures　(Tg)　up　to　163　°C　and　176　°C　respectively.　Besides,　polyesters　containing　linear　diols　are　semi-crystalline　with　melting　temperatures　(Tm)　ranging　from　110　to　189　°C.　The　semi-crystalline　nature　is　verified　by　X-ray　diffraction　and　polarized　optical　microscopy.　These　results　disclose　that　2,6-pyridinedicarboxylic　acid　(PDA26)　is　attractive　as　a　bio-occuring　molecule　for　preparing　both　high　Tg　and　semi-crystalline　polymers　when　finely　choosing　the　diols.　©　2025　Taylor　&　Francis　Group,　LLC.