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- W2953647985 abstract "Poly(lactic acid) (PLA)/poly(propylene carbonate) (PPC)/mica composites with different amount of chain extender (CE) were melt compounded and then processed via two routes (compression molding and uniaxial stretching) into sheets and films. The tensile, thermal, and oxygen barrier properties of all the samples were investigated. Tensile test showed that the tensile strength and elongation at break of all films were much higher than that of all sheets, especially for PLA/PPC/mica with 0.9-wt% CE composite (CM3(CE)0.9) film. The crystallinity of all films increased significantly after uniaxial stretching of sheet samples. The Fourier transform infrared spectroscopy (FTIR) results proved the chemical reactions occurred between PLA/PPC and CE. Scanning electron microscope (SEM) analysis revealed that compatibility and interfacial adhesion of all samples were improved after adding mica and CE, and they were further enhanced after uniaxial stretching. The addition of CE was not favorable to improve the oxygen barrier performance of PLA/PPC/mica sheet samples. However, the oxygen barrier performance of film samples was significantly improved after uniaxial stretching. In particular, the CM3(CE)0.9 film had the lowest oxygen permeability coefficient (1.4 × 10−15 cm3·cm/(cm2·s·Pa)), and this was the best oxygen barrier properties reported in the literature for PLA-based composites, which was comparable with PA film. This study demonstrated the high efficiency of uniaxial stretching on improvement of properties of composites, which would promote the application of biodegradable polymers in oxygen sensitive food packaging." @default.
- W2953647985 created "2019-07-12" @default.
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- W2953647985 date "2019-06-27" @default.
- W2953647985 modified "2023-10-17" @default.
- W2953647985 title "Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites" @default.
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- W2953647985 doi "https://doi.org/10.1002/pat.4691" @default.
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