以不饱和聚酯和Kraft（牛皮纸）木纤维为原料，以乙烯基异氰酸酯为偶联剂，制得了拉伸强度高达167．6MPa的热固性木塑复合材料，有望在工程结构领域中得到应用。湿热老化前后的拉伸性能测试、扫描电镜（SEM）和动态力学分析（DMA）表明，由于乙烯基异氰酸酯使复合材料界面形成牢固的化学键结合，使复合材料的力学性能和耐湿热性能显著提高；适当增加成型压力也能改善复合材料的界面结合效果而提高拉伸性能；湿热老化后，复合材料的拉伸性能都有所降低。但偶联剂改性复合材料的拉伸性能降幅明显减小。
Thermosetting wood-plastic composites (WPC) with tensile strength up to 167.6 MPa were prepared using unsaturated polyester (UPE) resin, Kraft wood fiber and vinyl isocyanate as coupling agent, which shows good potential application in structural engineering. The tensile evaluation, DMA analysis and SEM analysis of obtained WPC before and after hygrothermal aging indicate that both tensile properties and hygrothermal resistance of thermosetting WPCs are significantly improved due to the formation of covalent interracial bond from vinyl isocyanate. The hygrothermal aging leads to the obvious decrease of the tensile properties of composites; however, the composites prepared with vinyl isocyanate have much lower tensile decrease than those without the coupling agent.
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