Maleimide polymers have applications in the area of composite materials due to their good thermal stability, chemical resistance, and mechanical properties. The major shortcoming of bismaleimide systems is brittleness, which results in low damage tolerance and poor processing characteristics. Various attempts have been made to improve the impact and fracture toughness of polybismaleimide materials. One of the suitable reactions is the Michael additions of nucleophiles and thiols are generally good nucleophile cused as heteroatomic donors in the Michael addition. Existtence of sulfur has important role in preparation of biopolymers and these polymers can be engineering plastics with high applicatio in medicine. Also polymers containing acidic pendent grou are attend for synthesis of nanocomposite. Therfore in first ection of thi project, bismalimide 3,5-bis(dioxo-2-hydro-pyrol‌ 1-(5-hydro)yl)benzamido)benzoic acid, as monomer were synthesized through reaction of 4-malimido benzoyl chloride and 3,5-diamino benzoic acid. Novel poly(imidosulfide), have been synthesized by Micheal addition reaction between synthesized bismalimide and diamine contaning pendent acidic group. Influence of the reaction time on the inherent viscosity and the yield were examined. Acording to these resultes, The best condition were used. Synthetic polyimidosulfide have good yield and viscosity and were characterized by FT-IR, 1 H-NMR, elemental, thermogravimetric analysis (TGA) and X-ray diffraction (XRD) techniques. In order to existence acidic pendent group, ionization and the formation of the negatively charged in polymer structure, are expected polymer intraction with metals ion. As a result, novel nanocomposite, via sol gel reaction of the synthesized poly(imidosulfide) and Ag ion and throughout the reduction of metals, were prepared. The resulting nanocomposite were characterized by FT-IR, XRD, TGA, FE-SEM/EDX, and TEM. The TEM result indicated that the Ag particles were dispersed homogenously in nano scale in polymer matrix. Because of existence silver nanoparticles in the nanocomposite structure, its antibacterial properties were studied. Renewable and environmentally friendly energy sources will be essential for an ever-changing and populous planet. The most attractive alternative energy sources are fuel cells and. Polymer electrolyte membranes (PEMs) are key componentsthat determine the cost and performance of polymer electrolyte membrane fuel cells (PEMFCs). The most recent studies on PEMFCs have primarily focused on developing new proton conducting membranes for operation at highertemperatures under lower humidi?cation conditions so in the second section of the project , the disodium salts of the 3,3´-disulfonated-4,4´-dichlorodiphenyl sulfone were synthesized via the sulfonation of 4,4-dichlorodiphenyl sulfone sulfone with fuming sulfuric acid at 110 o C, then new disulfonatedpoly(arylene ether sulfone) copolymer containing carboxylic acid group on increase the ion exchange capacity for use in fule cell were synthesized by direct copolymerization of sulfonated aromatic dihalide and some of bisphenols. 1 H-NMR, FTIR, thermogravimetric analysis (TGA) was used to identify and characterize the sulfonated copolymers also data of elemental analysis it confirmed. These copolymers have high yield and moderate viscosity 0.15, 0.28 (dl/g) and exhibit good solubility in organic solutions, sodium salt copolymers dissolve in large volumes of water. The resulet of pH-meteric titration of copolymer indicated good ion exchange capacity (IEC), therefor these copolymers is good candidate for use in fule cell membranes.