||According to the current global production of bioplastics in 2017, PET and polyamide are the top two engineering plastics worldwide. PET exhibits disadvantages due to relatively low physical strength and Tg. One way to modify PET to yield a higher Tg and better mechanical properties is to combine polyesters and polyamides. PEAs are attracting widespread interests in many researchers. Though much effort has been involved into PEAs, to the best of our knowledge, only a few studies have been conducted in PEAs for engineering plastics. In this study, for the development of bioplastics having mechanical properties superior to PET, various diols were synthesized with amino acids and dimethyl esters which were non-edible bio-based materials. In the same process as PET, thermal bulk polymerization was succeeded. Thermal analysis showed that the Tg was nearly twice as high as that of PET, which enabled to utilize PEAs in applications requiring much wider temperature range.