木质纤维/PVC复合材料的蠕变和热稳定性

Study on Creep and Thermal Stability of Wood Fiber/PVC Composites

为研究不同木质类纤维/PVC复合材料的蠕变和热稳定性能,分别以桉木粉(EU)、杨木粉(PO)、松木粉(PI)和竹粉(BA)四种木质纤维为填料,聚氯乙烯(PVC)为基体,采用挤出成型法制备木塑复合材料。采用包括综合热分析仪在内的诸多方法,分析其官能团变化,表面微观形貌和热稳定性,并测试了复合材料的力学性能和蠕变性能。研究结果表明:桉木/PVC复合材料具有较好的蠕变抗性,较优的力学性能,其拉伸强度为36.94MPa,比杨木/PVC,松木/PVC、竹/PVC复合材料分别提高了49.38%、28.04%和29.61%,冲击强度和弯曲强度也相应提高;松木/PVC复合材料具有较好的热稳定性。

In order to investigate the creep and thermal stability of different kinds of wood fiber/PVC composites,four kinds of wood fiber(eucalyptus,poplar,pine and bamboo)were used as the filler and the polyvinyl chloride(PVC)as the matrix to prepare wood-plastic composites(WPC)through extrusion molding process.The functional group variation,the surface micro morphology and the thermal stability of wood fiber/PVC composites were analyzed by several methods including comprehensive thermal analyzer,respectively.The mechanical properties and creep perfprmance of the composites were also tested and analyzed.The results show that eucalyptus/PVC composites has better creep resistance and mechanical properties,the tensile strength reached up to 36.94 MPa,which increased by 49.38%,28.04%and 29.61%compared with poplar/PVC,pine/PVC and bamboo/PVC composites,respectively.And the eucalyptus/PVC composites also has larger impact strength and bending strength,The pine/PVC composite has better thermal stability.