A diacid monomer was synthesized by the condensation of L-tryptophan amino acid and pyromellitic dianhydride (PMDA). The diacid was utilized for the synthesis of three types of poly(amide-imide)s (PAIs) using three different kinds of diamines. The synthesized monomer and PAIs were characterized using FT-IR, 1H-NMR and 13C-NMR spectroscopies and the PAIs were also used for the fabrication of chitosan (CS)/PAI blend films. XRD patterns of the PAIs, CS and CS/PAI blend films were also studied. Thermal stability of PAIs, CS and CS/PAI samples were studied using thermogravimetric analysis (TGA). The blend samples showed a higher thermal stability compared to the CS film, especially at higher temperatures. Morphology of the CS and blend CS/PAI films were studied before and after the biodegradation by SEM. The mechanical stability studies showed that blend CS/PAI films had a proper mechanical strength and their young’s modulus increased compared to the pristine chitosan. The in vitro fungal colonization ofdiacid monomer, PAIs, pure CS and blend CS/PAI samples were performed using Aspergillus niger fungi. After biodegradation, the pure CS showed the highest weight loss of 21.2 wt % among the samples. The blend CS/PAI samples also showed higher weight losses compared to the pure PAIs.
[18] Benedict C. V., Cook W. J., Jarrett P., Cameron J., Huang S. J., Bell J. P., Fungal Degradation of Polycaprolactones, J. Appl. Polym. Sci., 28:327-334 (1983).
Ghasemi, M., Kowsari, E., & Amoozadeh, A. (2017). Chitosan/Poly(Amide-Imide) Blend Films: Studies on Thermal and Mechanical Stability, Morphology and Biodegradability. Iranian Journal of Chemistry and Chemical Engineering, 36(2), 55-70. doi: 10.30492/ijcce.2017.26697
MLA
Mahdiyeh Ghasemi; Elaheh Kowsari; Ali Amoozadeh. "Chitosan/Poly(Amide-Imide) Blend Films: Studies on Thermal and Mechanical Stability, Morphology and Biodegradability". Iranian Journal of Chemistry and Chemical Engineering, 36, 2, 2017, 55-70. doi: 10.30492/ijcce.2017.26697
HARVARD
Ghasemi, M., Kowsari, E., Amoozadeh, A. (2017). 'Chitosan/Poly(Amide-Imide) Blend Films: Studies on Thermal and Mechanical Stability, Morphology and Biodegradability', Iranian Journal of Chemistry and Chemical Engineering, 36(2), pp. 55-70. doi: 10.30492/ijcce.2017.26697
VANCOUVER
Ghasemi, M., Kowsari, E., Amoozadeh, A. Chitosan/Poly(Amide-Imide) Blend Films: Studies on Thermal and Mechanical Stability, Morphology and Biodegradability. Iranian Journal of Chemistry and Chemical Engineering, 2017; 36(2): 55-70. doi: 10.30492/ijcce.2017.26697