Manufacturing lightweight plastic parts with high productivity while maintaining a high level of quality and excellent reproducibility of cellular structure reduces the amount of raw material needed while improving the carbon balance thanks to the bio-sourced origin of the polymer and the decrease of the transported mass. In this study, structural modifications of PBS were carried out in order to control the foaming mechanism in each phase of cell formation (gas dissolution, cell nucleation, cell growth and cell stabilization). Cell morphology has been improved by modifying the molecular architecture (ramified/branched, semi-reticulate structures), promoting nucleation (decrease of surface tension leading to a decrease in Gibbs’s energy barrier), or by adjusting the extensional viscosity or Newtonien viscosity of the material. The resulting formulation exhibits a decrease of more than 80% in cell size and a cell density multiplied by 450 regarding the linear structured injection moulding PBS reference FZ71 (Mitsubishi Chemical Corporation (MCC), Japan) noted here L-PBS.

由于聚合物的生物来源和运输质量的降低，在保持高质量的同时又能保持蜂窝结构良好的可重复性的同时，高生产率地生产轻质塑料零件可以减少所需原料的数量，同时还能改善碳平衡。在这项研究中，进行了PBS的结构修饰，以控制细胞形成各阶段（气体溶解，细胞成核，细胞生长和细胞稳定）的发泡机理。通过改变分子结构（分枝/分支，半网状结构），促进成核作用（降低表面张力，导致吉布斯能垒降低），或通过调节材料的拉伸粘度或牛顿粘度，改善了细胞形态。 。