سنتز و شناسایی پلی آسپارتیمیدهای جدید حاوی گروه آویزان اسیدی و پلی آمیدهای دارای گروه آویزان مالیمیدی

in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymerized through double bond of maleimides that makes high crosslinked, dense and brittle polymers with poor solubility and processability. modification of bmi has an active research field to improve processing characteristic and thermomechanical properties by reduction of crosslinking and brittleness in polymers structure. likewise, condensation with various materials for making low softening points without a reduction in the thermal stability has good effects. michael addition reaction carried out in dmac and p-tsa have used as catalyst. synthetic polyaspartimides have good yield and moderate viscosity in range of 0.18-0.57 dl/g. desirable conditions have modified with consideration of yield and viscosity in various times of reaction. polyaspartimides are well known for their processability, thermal and mechanical permanence, electrical, photonic and flame retardant characteristic and various high performance applications. the other attempt in this project was included the synthesis of new diacid as monomer with maleimide pendent group and followed out synthesis of some new polyamides with maleimide pendent group. thermal stability is affected by the chemical structure of the polymer backbone as well as of the pendent groups. aromatic polymers are well known as high performance materials with outstanding thermal stability, good chemical resistance and excellent mechanical properties. aromatic polyamides are a very important class of high performance polymers in various applications requiring high thermal, mechanical and electrical characteristics because of their unique mechanical properties, and thermal stability. there are many different modification for enhance polymer’s processing, solubility, flexibility and thermal stability with bulky substituent as pendant group in polymer backbone. there are many different modification for enhance polymer’s processing, solubility, flexibility and thermal stability with bulky substituent as pendant group in polymer back bone. hence, the maleimide structure has been introduced into many polymeric systems aiming at improving thermal stability with high tg. the positive proceed for modifying the properties of polyamides is the introduction of aromatic or heterocyclic rings into the polymer backbone. reaction conditions modified with time, yield and viscosity. polymers containing maleimide group in polymeric backbone and as pendant group, are important type of thermoset polymeric materials that have found wide applications ranging from microelectronics to aerospace due to their good processability, high glass transition temperature and high modulus. these polyamides exhibit good yield, moderate viscosity in rang of 0.32-0.39 dl/g and moderate solubility which resulted from cross-linking in polymers backbone. chemical structure of two new monomers was confirmed with ft-ir, 1h-nmr, 13c-nmr and elemental analysis. all of polymers characterized with ft-ir and some of them characterized with 1h-nmr and elemental analysis. thermal properties of some polymers have discussed with tga and dsc analysis. xrd analysis have used in terms of the definition of morphological characteristics of the polyamide and polyaspartimide that were amorph. also, sem analysis used to confirm morphology of polyaspartimide.