将聚乙烯(PE)进行接枝改性,研究了改性PE用量对高填充木塑复合材料(WPC)耐化学腐蚀性的影响。结果表明:保持改性PE和未改性PE总用量不变,三种化学试剂(HCl、NaOH及H2O2)对高填充WPC质量变化率的影响随着改性PE用量的增加而逐渐减弱。其中HCl溶液对高填充WPC的质量变化率影响最大;NaOH溶液对WPC力学性能的影响高于其他两种化学试剂;在木粉用量固定为70%时,改性PE用量对经化学试剂腐蚀后的WPC的弯曲性能和冲击性能无明显补强作用。 Polyethylene (PE) was grafted and modified to study the effect of modified PE dosage on the chemical resistance of WPC. The results showed that the effect of three chemical reagents (HCl, NaOH and H2O2) on the mass change rate of WPC with high filling decreased with the increase of the amount of modified PE while keeping the total amount of modified PE and unmodified PE unchanged. Among them, HCl solution had the most significant effect on the mass change rate of WPC with high filling; NaOH solution had higher influence on the mechanical properties of WPC than the other two chemical reagents; when the amount of wood flour was fixed at 70% WPC bending performance and impact performance no significant reinforcing effect.