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- Title
Poly(ethylene terephalate) prepolymer graft modification of nano-TiO<sub>2</sub> and its effect on mechanical property of polycarbonate nanocomposites.
- Authors
Li, L.; Shi, L.-Y.; Zhang, Y.; Cao, S.-M.; Feng, X.
- Abstract
Nano-TiO2 particles were modified by the poly(ethylene terephalate) prepolymer (pre-PET) via polycondensation. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results showed that pre-PET was successfully grafted on the surface of the nano-TiO2 particles. Thermogravimetric analysis results indicated that the grafting efficiency depended on the vacuum degree. Compared to the original nano-TiO2, the grafted nano-TiO2 had better compatibility with the polycarbonate (PC) matrix and could be dispersed more homogeneously in PC. Hence, interfacial adhesion between TiO2 and PC was enhanced. The mechanical properties of the resultant PC/nano-TiO2 composites like tensile strength and notched impact strength were greatly improved. Calculated respectively from tensile yield stress PC/nano-TiO2 composites, the interfacial interaction parameter B was employed to quantitatively characterise the effective interracial interaction between the nano-TiO and PC matrix. It demonstrated that the nano-TiO2 grafted with pre-PET had stronger effective interfacial interaction with PC matrix than original nano-TiO2.
- Subjects
NANOSTRUCTURES; TITANIUM dioxide; POLYETHYLENE terephthalate; POLYMERS; CONDENSATION
- Publication
Materials Science & Technology, 2009, Vol 25, Issue 8, p1028
- ISSN
0267-0836
- Publication type
Article
- DOI
10.1179/174328408X317057