模压压力和温度对PE/麦秸秆发泡复合材料的影响

Effects of Molding Pressure and Temperature of PE/Wheat Straw Foam Composite

为探讨模压压力和温度对聚乙烯(PE)/麦秸秆发泡复合材料微观结构和性能的影响,以偶氮二甲酰胺(AC)为发泡剂模压制备PE/麦秸秆发泡复合材料,对比研究模压压力和温度对PE/麦秸秆发泡复合材料热导率、表观密度和吸水性能的影响,用体视显微镜观察材料的断面微观形貌,用傅立叶变换红外光谱分析探讨复合材料的化学结构。结果表明,当模压压力为10 MPa,模压温度为150℃时,PE/麦秸秆发泡复合材料内部泡孔结构均匀,热导率、表观密度和吸水率较小,麦秸秆和PE的界面结合较好,材料较致密。

Azodicarbonamide（AC） was adopted as a foaming agent to prepare polyethylene（PE）/wheat straw foam composite by compression molding process to investigate the effects of molding pressure and temperature on the microstructure and properties of PE/wheat straw foam composite. In order to compare the effects of molding pressure and temperature on the thermal conductivity,apparent density and water absorption capabilityof the foam composites,stereomicroscope was used to observe the section microstructure of material,FTIR was used to characterize the chemical structure of materials. The results indicate that when the molding pressure and temperature are 10 MPa and 150℃respectively, the foam structure inside the PE/wheat straw foam com-posite is uniform, the thermal conductivity, apparent density and water absorption of PE/wheat straw foam composite are lower, wheat straw and PE have better interfacial adhesion so that the material has dense structure.