Thermal-oxidative Aging Properties of Short Glass Fiber Reinforced Nylon 10T Composites
SONG Hai-shuo1,2, ZHOU Deng-feng1,3, ZHANG Dao-hai1,2, GUO Jian-bing1,2
1. School of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;
2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China;
3. School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang 550003, China
Abstract：Short glass fiber reinforced polyamide 10T (SGF/PA10T) composites were prepared by melt blending method, and the thermal-oxidative aging properties of SGF/PA10T composites at 240℃ were characterized by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis(DMA), FT-IR and mechanical properties test. The results show that the crystallization onset temperature of SGF/PA10T increases, the interfacial interaction between glass fiber and PA10T matrix is weakened, and damping capacity decreases during the thermal-oxygen aging process. With the increase of thermal-oxygen aging time, the glass transition temperature increases first and then decreases. Arrhenius equation was used to determine the glass transition activation energy of SGF/PA10T,and the results show that the mobility of molecular chain is changed and PA10T molecular chains are slight cross-linked in preliminary aging stage. At the same time, the thermal-oxygen can significantly reduce the mechanical properties of SGF/PA10T composites, after age at 240℃ for 50d,the tensile strength, flexural strength and impact strength retention rates are 18.4%, 9.8% and 37.7% respectively.
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