Preparation and Characterization of Poly(ethylene terephthalate)/ Calcium Carbonate Nanocomposites

doi:10.7503/cjcu20120812

Abstract

Abstract:

In order to improve the dispersion and increase the compatibility between nanoparticles and poly(ethylene terephthalate)(PET) matrix, calcium carbonate(CaCO₃) nanoparticles were successfully prepared via a carbonization route with polyethylene glycol phosphate 1000(PGP) as the modifying agent. PET/CaCO₃ nanocomposites were prepared by further in situ polymerization. The products were characterized by transmission electron microscope(TEM), X-ray powder diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), field emission scanning electron microscopy(FESEM) and thermo gravimetric analysis(TGA). It was found that PGP was successfully modified on the surface of CaCO₃. Compared to the nanocomposite filled with the blank CaCO₃, a significant improvement in thermal stability and dispersion was observed with the addition of 0.2%(mass fraction) PGP of the modified CaCO₃. Friedman method was used to investigate activation energies of nanocomposites during thermal decomposition. The average of activation energies for PET, PET/blank CaCO₃ and PET/modified CaCO₃ were 200.58, 214.86 and 219.50 kJ/mol, respectively, indicating the modified CaCO₃ incurred better thermal stability of PET.

Key words: Calcium carbonate, Poly(ethylene terephthalate), Dispersion, Thermal stability

CLC Number:

O647
O635

TrendMD:

GAO Wei, WANG Yuan-Rui, WANG Zi-Chen, ZHU Yan-Chao. Preparation and Characterization of Poly(ethylene terephthalate)/ Calcium Carbonate Nanocomposites[J]. Chem. J. Chinese Universities, 2013, 34(3): 601.

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Preparation and Characterization of Poly(ethylene terephthalate)/ Calcium Carbonate Nanocomposites

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