Title of article :
Studies on syntheses and morphology characteristic of chiral novel poly(ester-imide)/TiO2 bionanocomposites derived from l-phenylalanine based diacid
Author/Authors :
Mallakpour، نويسنده , , Shadpour and Soltanian، نويسنده , , Samaneh، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2010
Pages :
8
From page :
5369
To page :
5376
Abstract :
In this study, a new optically active poly(ester-imide) (PEI) was synthesized from the polymerization reaction of N,N′-(pyromellitoyl)-bis-l-phenylalanine diacid with 4,4′-thiobis(2-tert-butyl-5-methylphenol) using tosyl chloride, pyridine and N,N-dimethyl formamide as a condensing agent. The obtained polymer and inorganic metal oxide bionanocomposites composed of poly(ester-imide)/titanium dioxide were synthesized through ultrasonic irradiation. The formation of PEI was confirmed by 1H NMR, fourier transform IR spectroscopy (FT-IR), specific rotation and elemental analysis. The resulting bionanocomposites were characterized by FT-IR, powder X-ray diffraction (XRD), atomic force microscopy)AFM(, scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The TEM, SEM and FE-SEM results indicated that the nanoparticles were dispersed homogeneously in PEI matrix on nanoscale. TGA confirmed that the heat stability of the nanocomposite was improved in the presence of TiO2 nanoparticles.
Keywords :
Optically active polymer , Bionanocomposites , Poly(ester-imide)
Journal title :
Polymer
Serial Year :
2010
Journal title :
Polymer
Record number :
1736302
Link To Document :
بازگشت