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| 1 | Preparation and Characterization of the Covalent-Integrated Poly(lactic acid) and Scrap Leather Fiber Composites显示文摘Scrap leather fibers(SLFs) modified with active silane containing epoxide groups were incorporated into poly(lactic acid)(PLA) modified by vinyl trimethoxysilane,i.e.,the PLA/SLF composites were prepared for bio-composites by solvent compounding technology in this article.The effects of silane coupling agents on the structures of PLA and SLF molecules were examined,and the mechanical properties and thermal stability of PLA/SLF composites were also measured.The results of Fourier-transform infrared spectroscopy(FTIR) had proved that silane had been incorporated successfully to PLA and SLF molecules by means of the solvent technology.Scanning electric microscopy(SEM) was used to investigate both the changes in shapes between the pristine SLFs and the treated SLFs and the microscopic structures of composites.According to SEM results,it was shown that there were some significant differences between the untreated and treated SLFs,and a double continuous phase structure had occurred in PLA/SLF composites due to the excellent dispersion of SLFs in matrix.The addition of the treated SLFs into PLA resulted in a distinct improvement of the impact and tensile strengths.When the mass fraction of the treated SLFs was 15%,the notched impact strength and tensile strength of PLA/SLF bio-composites were improved by 34.4%and 21.2%compared with the pristine PLA,respectively. Additionally,with the increase of the modified SLFs content,the thermal stability of PLA/SLF bi-composites was apparently improved.The macroscopic properties of bio-composites were found to be strongly dependent on their components,concentration,dispersion and resulted morphological structures. | 段景宽 范常秀 李亚 蒋岚 邵双喜 | 2012 | Journal of Shanghai Jiaotong university(Science)2012，17，5： | 7 |
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