将废旧瓦楞纸板粉碎制取废纸板纤维,与玉米淀粉、聚乙烯醇共混辅以发泡剂偶氮二甲酰胺-氧化锌(AC-ZnO),利用注塑发泡法制备废纸板纤维/淀粉发泡复合材料.采用双料筒毛细管流变仪,研究了甘油-邻苯二甲酸二辛酯(G-DOP)混合塑化剂含量、废纸板纤维含量、相容剂聚丙烯酸(EAA)含量、AC-ZnO含量以及温度对废纸板纤维/淀粉发泡复合材料的流变行为的影响,采用SEM研究了不同熔体黏度对泡孔形态的影响.结果表明:废纸板纤维/淀粉发泡复合材料熔体流动特征表现为假塑性.随着混合塑化剂含量的增加,熔体黏度下降;随着废纸板纤维含量的增加,熔体黏度增加;随着EAA含量的增加,熔体黏度增加;随着AC-ZnO含量的增加,熔体黏度下降;随着温度的升高,熔体黏度先降低后升高.随着熔体黏度的降低,泡孔数量减小,孔径增大,当熔体黏度为900 Pa·s时,泡孔合并现象严重.
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