Compared to previously reported polyesters based on methoxylated BPA analogs and aliphatic linkers, the 3-G-DMS polyester displayed similar Tg and tensile stress at break (~3 MPa). However, while the former produced brittle films with only ~1% elongation at break, 3-G-DMS formed flexible films with elongation at break of more than 200%. In addition, 3-G-DMS displayed a significantly improved thermal stability (~100 °C higher). This thermal stability is also on par with the previously reported methoxylated bisphenol-based polyterephthalate. 14b This is noteworthy, since thermal stability of a polymer is typically proportional to its aromatic content, and 3-G-DMS features only a limited amount of aromatic constituents.