화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.24, No.10, 900-908, October, 2016
DOI10.1007/s13233-016-4131-4  Export Citation
In Situ Polymerized Poly(butylene succinate-co-ethylene terephthalate)/Hydroxyapatite Nanocomposite with Adjusted Thermal, Mechanical and Hydrolytic Degradation Properties
Hadi Shirali, Mehdi Rafizadeh†, and Faramarz Afshar Taromi
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
E-mail:
New nanocomposites of poly(butylene succinate-co-ethylene terephthalate)/nano hydroxyapatite were synthesized using two-step in situ polycondensation. The composition, microstructure, morphology and dispersion of nanoparticles in the nanocomposites were studied using proton nuclear magnetic resonance (1H NMR), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that presence of nano hydroxyapatite catalyzes the reaction and there is a chemical bond between nanoparticles and polymer which leads to a good particle dispersion but it doesn’t affect molecular sequence length. Nanocomposites’ thermal properties evaluated by differential scanning calorimetry (DSC) and X-ray diffraction (XRD), showed that crystallinity and crystallite size slightly decrease with the nanoparticles weight fraction. Moreover, the elastic modulus slightly increases and tensile strength and elongation at break decrease with the nanoparticles weight fraction according to dynamic mechanical thermal analysis (DMTA) and tensile analysis. Introducing nano hydroxyapatite increases the hydrolytic degradability dramatically because of the presence of hydrophilic nanoparticle and lower crystallite size.
Keywords:copolyester;nanocomposite;poly(butylene succinate-co-ethylene terephthalate);nano hydroxyapatite;degradability
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