中文摘要：

用马来松香对木粉进行流动性能改善处理,与高密度聚乙烯（HDPE）熔融复合,挤出成型制备木粉/HDPE复合材料（WF-HDPE）。利用傅里叶变换红外光谱（FTIR）和X-射线光电子能谱（XPS）技术,分析经马来松香改性前后木粉表面官能团的变化和元素的变化,采用旋转流变仪研究WF-HDPE的流变行为。FTIR与XPS分析表明,马来松香分子中的酸酐基团与木粉表面的羟基发生了酯化反应,并且马来松香是以单酯的形式接枝到木粉表面,同时产生一游离羧基。WF-HDPE流变学研究表明：复合材料的复合黏度（η＊）、储能模量（G′）和损耗模量（G″）随马来松香用量的增加先减小后增大最后减小,但体系的黏度和模量总体呈下降趋势,木粉经马来松香改性后复合熔体的流变性能显著改善,这不仅有利于提高复合材料的成型加工效率,而且适当的马来松香处理也能够提高复合材料的拉伸强度和弯曲强度,后者被静态力学试验结果所证实。

英文摘要：

Wood flour was treated with maleic rosin to improve its flow behavior, then compounded with high density polyethylene （HDPE） by an extruder to prepare wood-flour/HDPE composite （WF-HDPE）. X-ray photoelectron spectroscopy （XPS） and fourier transform infrared spectroscopy （FTIR） techniques were used to study the change of the function group and element on wood flour before and after treatments. The rheological behavior of WF-H. DPE composites were investigated by a rotary rheometer. XPS and FTIR spectroscopy analysis indicated that chemical bonds were formed between maleic rosin and wood flour through the esterification reaction of anhydride groups and hydroxyl groups on wood surface. Maleic rosin has been added to the surface of wood flour in the form of monoester, i.e., the formation of estefified wood flour bearing a pendent carboxylic group. The rheological study showed that the complex viscosity （ η＊）, storage modulus （G′） and loss modulus （G″） of WF-HDPE composites decreased firstly and increased afterward and declined lastly as the dosage of maleic rosin increased, however, the viscosity of the composite melts decreased as a whole. After the modification of wood flour, the rheological properties of composite melts were improved markedly. According to the mechanical test it was indicated that, by proper treatment of wood flour with maleic rosin, the tensile strength and flexural strength of WF-HDPE increased obviously.