4494

4228

كارشناسي ارشد

شيمي آلي - پليمر

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1387

چهارده، 129،[II] ص: جدول، نمودار

ص.ع. به:انگليسي و فارسي

شادپور ملك پور

مهران غياثي

29/2/1388

حميد جواهريان نقاش، امير عبدالملكي

1396/09/12

كتابنامه

شيمي

ID4228

به فارسي وانگليسي:نسخه قابل رويت درنسخه ديجيتال

Abstract Throughout this project a series of novel chiral polyesters PE s and polyamides PA s were synthesized bydirect polycondensation in conventional organic solvens and ionic liquid IL For this purpose for the first time chiral monomer 5 9 10 dihydro 9 10 ethanoanthracene 11 12 dicarboximido 3 methylbutanoylamino isophthalic acid was synthesized in four steps The chemical structure of this monomer was confirmed by FT IR 1 H NMR 13C NMR spectroscopies elemental analysis and specific rotation Direct polycondensation of thismonomer with different diols for producing extended PEs was carried out in the presence of tosyl chloride N N dimethylformamide pyridine Py as condensing agent under conventional heating The optically active PEswere obtained with good yield and moderate inherent viscosity ranging from 0 23 to 0 48 dL g and showed goodthermal stability In the next stage the PAs were prepared by two different methods either in presence oftriphenyl phosphite TPP CaCl2 Py 1 methyl 2 pyrrolidone NMP and tetrabutylammonium bromide TBAB TPP At first for understanding the role of TBAB and TPP in polymerization two reactions werecarried out in the presence of all materials except TBAB and in another trial reaction in the absence of TPP Noprecipitations were obtained so it reveals that the presences of both of them are necessary in polycondensationreaction The ratio between TPP and monomer was optimized Inherent viscosities of these polymers were in therange of 0 31 0 46 dL g and 0 23 0 56 dL g respectively They showed good yield and thermal stability Itseems the existence of the imide pendant group in the polymer residue causes this good thermal stability In thepresence of ionic liquid better thermal properties were obtained The chemical structures of all syntheticpolymers were confirmed by elemental analysis FT IR and 1H NMR spectroscopy

شادپور ملك پور

مهران غياثي

حميد جواهريان نقاش، امير عبدالملكي