Synthesis and Characterization of Novel Biobased Ion-Exchange Bisfuran Polyamides Prepared by Interfacial Polycondensation of Bisfuran Diamine Monomer and Sustainable Dicarboxylic Acid Derivatives

Polymers based on the furanic compounds derived from renewable carbohydrates have seen massive growth due to their unique properties and increasing concerns about sustainability and environmental challenges. In this study, fully bio-based four new linear ion-exchange polyamides were synthesized by interfacial polymerization of bisfuran diamine monomer (BFN). The BFN monomer is prepared by condensing 2-aminomethyl furan with levulinic acid using an acid catalyst. The bisfuran polyamides are generally considered hydrophilic, with an observed swelling capacity range from 108 to 192%. The ion exchange capacity range was observed from 2.19 to 2.35. The thermal properties of the bisfuran polyamides were studied with differential scanning calorimetry and thermal gravimetric analysis. The glass transition values were ranged from 162.2 to 122.1 degrees C, and the 1% mass loss at temperatures was above 215 degrees C. An X-ray diffraction study proves amorphous nature with some degree of crystallinity at theta = 20 degrees. [GRAPHICS] .