In this article, the fabrication of bimodal type of cellular structures and multimodal type of cellular structures of acrylonitrile–butadiene–styrene foams has been reported using solid‐state batch foaming process by distinct, stepwise depressurization technique. Each depressurization step induces a distinct nucleation phenomenon, which leads to the development of multimodal cellular microstructures. The significance of crucial process parameters, which includes saturation pressure, holding pressure, holding time and holding steps, was studied in the development of bimodal and multimodal cellular structures. Further, the influence of the depressurization rate on the volume ratio of small cells to large cells vice versa was also studied. The morphological attributes, which includes cell size, cell density, and cell morphologies, were investigated in detail. This study puts forward a basic mechanism to develop and simultaneously control bimodal and multimodal cellular microstructures by altering the crucial process parameters. POLYM. ENG. SCI., 60:113–131, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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逐步降压发泡工艺开发的ABS发泡复合材料的双峰微孔形态评估

在本文中，已经报道了采用固态分批发泡工艺通过独特的逐步降压技术制造丙烯腈-丁二烯-苯乙烯泡沫的双峰型孔结构和多峰型孔结构。每个降压步骤都会引起独特的成核现象，从而导致多峰细胞微结构的发展。在开发双峰和多峰细胞结构中，研究了关键工艺参数的重要性，包括饱和压力，保持压力，保持时间和保持步骤。此外，还研究了降压速率对小细胞与大细胞反之亦然的体积比的影响。形态学属性，包括细胞大小，细胞密度和细胞形态，进行了详细调查。这项研究提出了通过改变关键的工艺参数来开发并同时控制双峰和多峰细胞微结构的基本机制。POLYM。ENG。SCI。，60：113–131，2020.©2019塑料工程师协会