In this work, polypropylene (PP) was foamed via rotational molding using a chemical blowing agent (CBA) based on azodicarbonamide over a range of concentration (0 to 0.5% wt.). The samples were then analyzed in terms of morphological, thermal and mechanical properties. The morphological analysis showed a continuous increase in the average cell size and cell density with increasing CBA content. Increasing the CBA content also led to lower foam density and thermal conductivity. Similarly, all the mechanical properties (tension, flexion and impact) were found to decrease with increasing CBA content. Finally, the efficiency of the rotomolding process was assessed by producing neat PP samples via compression molding. The results showed negligible differences between the rotomolded and compression molded properties at low deformation and rate of deformation indicating that optimal rotomolding conditions were selected.

在这项工作中，使用基于偶氮二甲酰胺的化学发泡剂（CBA）通过旋转成型将聚丙烯（PP）发泡至一定浓度范围（0至0.5％重量）。然后根据形态，热和机械性能对样品进行分析。形态分析显示，平均细胞大小和细胞密度随着CBA含量的增加而持续增加。增加CBA含量也导致较低的泡沫密度和导热性。同样，发现所有机械性能（拉伸，弯曲和冲击）都随着CBA含量的增加而降低。最后，通过压模生产纯净的PP样品，评估了滚塑工艺的效率。