3900

3683

كارشناسي ارشد

شيمي آلي _ پليمر

اصفهان، دانشگاه صنعتي اصفهان، دانشكده شيمي

1386

سيزده، ، 125،[II] ص: مصور، جدول، نمودار

ص.ع به: فارسي و انگليسي

شاد پور ملك پور

16/2/78

مهران غياثي، حميد جواهريان نقاش

شيمي

ID3683

به فارسي وانگليسي: قابل رويت در نسخه ديجيتال

Abstract In this project a series of polyureas PU s and novel polyamides PA s were synthesized bydifference methods the structure and some physical properties of them are reported At first forthe syntheses of difference polyureas 4 phenylurazol was used as a monomer Polymerizationreactions of this compound with various diisocyanates were performed under conventionalheating in dimethylacetamide and tetrabutylammonium bromide as a solvent Then thesereactions were also carried out under microwave irradiation The inherent viscosities of resultingpolymers were in the range 0 23 0 29 dL g and 0 24 0 30 dL g respectively and they showmoderate thermal properties In the second project in order to preparation new optically activepolyamides the reaction of 5 4 methyl 2 phthalimidylpentanoylamino isophthalic acid as abulky monomer with different diisocyanate were performed Different kind of catalyst wasoptimized for the reaction of this monomer with MDI as a diisocyanate The optimized conditionwas used in the other polycondensations Inherent viscosities of these polymers were in the rangeof 0 31 0 63 dL g and it showed good thermal stability In the next project an attempt was madeto construct the new chiral monomer containing L leucine phthalic anhydride 4 aminobenzoicacid and 5 aminoisophthalic acid 5 4 methyl 2 phthalimidylpentanoylamino isophthalic acidwas synthesized in five steps The chemical structure of this monomer was confirmed by FT IR 1 H NMR 13C NMR spectroscopy elemental analysis and specific rotation Directpolycondensation of this monomer with different diamines for producing extended PAs wascarried out either in the presence of N methyl pyrrolidone triphenyl phosphite TPP calciumchloride Py as condensing agent under conventional heating and microwave irradiation Inherentviscosities of these polymers were in the range of 0 37 0 73 dL g and 0 43 0 73 dL g respectively They showed good yield and thermal stability Also the polymerization reaction ofthis monomer with different aromatic diamines at the peresence of TPP and ionic liquid as areaction medium performed under conventional heating and microwave irradiation Inherentviscosities of these polymers were in the range of 0 46 0 81 dL g and 0 39 0 82 dL g respectively They exhibited good solubility and thermal stability It seems the existence of theimide pendent group in the polymer residue causes this good thermal stability In the presence ofionic liquids better results were obtained The chemical structures of all synthetic polymers wereconfirmed by elemental analysis FT IR and 1H NMR spectroscopy

شاد پور ملك پور

مهران غياثي، حميد جواهريان نقاش