3849

188 دكتري

دكتري

آلي-پليمر

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1386

نوزده،162،[II]ص: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

شادپورملك پور

19/01/87

بهمن تمامي، مهران غياثي،ايرج محمدپور بلترك، سعيد نوري خراساني

شيمي

ID188 دكتري

به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال

Abstract In this project bis p aminobenzoic acid N trimellitylimido S valine bis p aminobenzoic acid N trimellitylimido L methionine N trimellitylimido L methionine and 5 2 phthalimidyl 3 methylbutanoylamino isophthalic acid were prepared as diacid monomers These monomers have S valineand L methionine moieties and are optically active The structures of these compounds were confirmedusing FT IR 13C NMR 1H NMR spectroscopies specific rotation and elemental analysis techniques Several series of optically active poly amide imide s poly amide ester imide s wholly aromaticpolyamides and polyesters were prepared by reaction of these new diacids with different diols ordiamines Direct polycondensatios were applied to prepare the polymers Tosyl chloride TsCl N N dimethylformamide DMF pyridine Py condensing agent was used to prepare polyesters and thiscondensing agent as well as thionyl chloride in Py TsCl triphenylphosphine oxide Py N methyl 2 pyrrolidone NMP triphenylphosphite TPP Py and TPP in ionic liquids were also used as condensingagents to prepare new polyamides All of these processes are direct methods for polymerization andthere is not need to prepare diacid chloride for polymerization reactions The use of ionic liquids assolvent and catalyst for polyamidation reaction eliminate the need of volatile and toxic solvents such asNMP and pyridine Two methods were applied to prepare polyamides in ionic liquids conventionalheating and microwave irradiation Using microwave irradiation as a source of energy polyamideswere obtained in a short time and this is the main advantage of this method The resulting polymerswere characterized by FT IR 13C NMR 1H NMR spectroscopies specific rotation elemental analysisand thermogravimetric analysis The resulting polymers had inherent viscosity ranging 0 25 0 75 dL g These polymers show good to high thermal stability have flexible amino acids and show almost goodsolubility in most polar organic solvents Polymers from 5 2 phthalimidyl 3 methylbutanoylamino isophthalic acid have bulky pendent groups and consequently reduce packingefficiency of polymer chains therefore show higher solubility Because of existence of amino acids inthe polymers chains these polymers are expected to be biocompatible and biodegradable Due to thechirality these polymers can be used in chromatography for chiral resolution of racemic mixtures

شادپورملك پور

بهمن تمامي، مهران غياثي،ايرج محمدپور بلترك، سعيد نوري خراساني