粉煤灰/高密度聚乙烯复合材料的性能研究

Study on the Properties of Fly Ash/High Density Polyethylene Composites

采用熔融共混的方法制备了粉煤灰(FA)/高密度聚乙烯(HDPE)复合材料。研究了粉煤灰的粒径对复合材料的力学性能、热性能、加工性能、微观形貌和结晶性能的影响。结果表明,减小粉煤灰的粒径可以改善复合材料的韧性,当FA的粒径为2.4μm时,复合材料的断裂伸长率与冲击强度分别为54.1%、8.5 kJ/m2,比粒径为28μm时分别提高了42.7%和37.1%。随着粉煤灰粒径的减小,FA/HDPE复合材料的熔体质量流动速率(MFR)增大;FA/HDPE复合材料的初始分解温度、残留质量降低;HDPE基体的结晶度增大。

Fly ash （FA）/high density polyethylene （HDPE） composites were prepared by melt mixing.The effects of the particle size of fly ash on the mechanical properties,thermal properties,processability,microstructure and crystallization property of FA/HDPE composites were investigated.The results showed that the toughness of the FA/HDPE composites was inproved with the decrease of the particle size of fly ash.When the particle size of FA was 2.4μm,the elongation at break and the impact strength of composites were 54.1%,8.5 kJ · m-2and 42.7%,37.1% higher than that of the composite which the particle size of was 28 μm,respectively.The MFR of FA/HDPE increased,the initial decomposition temperature and the residue quality decreased,the degree of crystallinity of HDPE marix increased,with the decrease of the particle size of fly ash.