Effect of TiO2-Crystal Forms on the Photo-Degradation of EVA/PLA Blend Under Accelerated Weather Testing

被引:13
作者
Do Van Cong [1 ]
Nguyen Thi Thu Trang [1 ]
Nguyen Vu Giang [1 ]
Tran Dai Lam [2 ]
Thai Hoang [1 ]
机构
[1] Vietnam Acad Sci & Technol, Inst Trop Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
[2] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
关键词
Poly (ethylene-co-vinyl acetate); poly (lactic acid); titanium dioxide; nanocomposites; photo-degradation; ETHYLENE-VINYL ACETATE; POLY(LACTIC ACID); MECHANICAL-PROPERTIES; TIO2; NANOPARTICLES; NANOCOMPOSITES; DEGRADATION; IRRADIATION; FILMS; SIZE; UV;
D O I
10.1007/s11664-016-4409-5
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Photo-degradation of poly (ethylene-co-vinyl acetate) (EVA)/poly (lactic acid) (PLA) blend and EVA/PLA/TiO2 nanocomposites was carried out under accelerated weather testing conditions by alternating cycles of ultraviolet (UV) light and moisture at controlled and elevated temperatures. The characters, properties, and morphology of these materials before and after accelerated weather testing were determined by Fourier transform infrared spectroscopy, colour changes, viscosity, tensile test, thermogravimetric analysis, and field emission scanning electron microscopy. The increases in the content of oxygen-containing groups, colour changes; the decreases in viscosity, tensile properties, and thermal stability of these materials after accelerated weather testing are the evidence for the photo-degradation of the blend and nanocomposites. After accelerated weather testing, the appearance of many micro-holes and micro-pores on the surface of the collected samples was observed. The photo-degradation degree of the nanocomposites depended on the TiO2-crystal form. Rutile TiO2 do not enhance the degradation, but anatase and mixed crystals TiO2 nanoparticles promoted the degradation of the nanocomposites. Particularly, the mixed crystals TiO2 nanoparticles showed the highest photo-catalytic activity of the nanocomposites.
引用
收藏
页码:2536 / 2546
页数:11
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