화학공학소재연구정보센터
Macromolecular Research, Vol.26, No.1, 13-21, January, 2018
Nonisothermal crystallization behavior of poly(butylene succinate)/NaY zeolite nanocomposites
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The poly(butylene succinate) (PBS) is a biodegradable polymer widely employed in the industry and its microstructure is strongly determined by its crystallization. Consequently, this paper investigates the nonisothermal crystallization behavior of PBS nanocomposites filled with NaY zeolite. The samples were prepared by melt blending with the insertion of 1 and 2 wt% filler. The nonisothermal crystallization was investigated from differential scanning calorimetry, whereas the crystalline structure was studied by wide-angle X-ray diffraction and the morphology of spherulites was observed by Optical Microscopy. From these techniques, the crystallinity of PBS appeared to increase with the addition of zeolite and the crystals displayed a larger size. In the nonisothermal crystallization kinetics Avrami model was found to be applicable. Dobreva’s method highlighted the nucleating effect induced by the zeolite and the crystallization activation energy indicated a modification of the polymer chain diffusion. The results showed that the zeolite induced two simultaneous effects with promoting the nucleation and also the crystal chains expansion of PBS during its nonisothermal crystallization.
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