Cellulose acetate (CA) is a natural biodegradable polymer. It forms transparent films by the casting technique. CA suffers from high degree of water permeability as well as the low thermal stability at high temperatures. To adjust the CA polymeric films to the manufacture of food packaging, its thermal and mechanical properties should be improved. The modification of CA by grafting it with N-Amino phenyl maleimide (N-APhM) led to the construction of hydrophobic branches throughout the polymeric matrix which reduced its wettability as compared to the parent CA. The branches built onto the polymeric chains had been characterized by UV/Vis, 13C-NMR and ESEM. The improvement of the thermal properties was investigated and compared to the parent CA using thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), differential thermal analysis (DTA), contact angle and mechanical testing measurements. The results revealed that the water-uptake was reduced by increasing the graft percentage. The thermal and mechanical properties were also improved.
 A. K. Mohanty, A. Wibowo, M. Misra and L. T. Drzal, “Development of renewable resource-based cellulose acetate bioplastic: Effect of process engineering on the performance of cellulosic plastics,” Polym. Eng. & sci., Vol. 43 (5), pp. 1151-1161, 2003.
 V. Thakur and S. Voicu,. “Recent advances in cellulose and chitosan based membranes for water purification: A concise review,” Carbohyd. Polym., Vol. 146, pp. 148-165, 2016.
 L. S. Nair and C. T. Laurencin, “Biodegradable polymers as biomaterials,” Prog. Polym. Sci., Vol. 32 (8-9), pp.762-798, 2007.
 D. Briassoulis, “An Overview on the Mechanical Behaviour of Biodegradable Agricultural Films,” J. Polym. Env. Vol. 12 (2), 65-81, 2004.
 H. Kamal and F.M. Abd-Elrahimb and S. Lotfy, “Characterization and some properties of cellulose acetate-co-polyethylene oxide blends prepared by the use of gamma irradiation,” J. Rad. Res. Appl. Sci., Vol.7 (2), pp.146-153, 2014.
 R. Chandra and R. Rustgi, Biodegradable polymers. Progress in Polymer Science, 23 (7), pp. 1273-1335, 1998.
 A. S. Abdel-Naby and S. A. Aboubshait, “Cellulose acetate blends with acrylonitrile/N-phenyl maleimide copolymers morphological and thermal properties”. J. Therm. Anal. Calor., Vol. 114 (3), pp. 1279–1286, 2013.
 A. S. Abdel-Naby and A. A. Al-Ghamdi, “Chemical modification of cellulose acetate by N-(phenyl amino) maleimides: Characterization and properties,” Int. J. Biol. Macromol., Vol. 68, pp. 21–27, 2014.
 A. S. Abdel-Naby and A. O. Al-Dossary, Use of N-(N0-Arylamino) maleimides to Improve theThermal Properties of Poly (vinyl chloride) Through Chemical Modification and Graft Copolymerization. J. Vinyl. Addit. Technol. Vol. 14 (4), pp. 167-174, 2008.
 Abdel-Naby, A. S. and A. O. Al-Dossary, Stabilization of poly (vinyl chloride) against photo-degradation using dienophilic compounds. J. Appl. Polym. Sci. Vol. 114, pp. 3218–3228, 2009.
 O. A. Fridman and A. V. Sorokina. Criteria of efficiency of cellulose acetate plasticization. Polym. Sci. ser. B. Vol. 48 (9-10), pp. 233-236, 2006.