This study from Michele Galizia and colleagues on page 2547 sets forth a multiscale method to investigate the molecular mechanism of polybenzimidazole (PBI) plasticization upon exposure to organic species, which is of great relevance in applications such as Organic Solvent Reverse Osmosis and Nanofiltration. “Competitive hydrogen bonding” is what ultimately causes PBI plasticization. According to this mechanism, methanol molecules disrupt the hydrogen bonded network of dry PBI by forming mutual polymer/penetrant hydrogen bonds, which enhances polymer chain mobility. (DOI: 10.1002/pol.20200151)

中文翻译：

---

封面图片，第58卷，第18期

Michele Galizia及其同事在第2547页上进行的这项研究提出了一种多尺度方法，用于研究聚苯并咪唑（PBI）暴露于有机物质后增塑的分子机理，这在诸如有机溶剂反渗透和纳滤等应用中具有重要意义。最终导致PBI塑化的原因是“竞争性氢键”。根据该机理，甲醇分子通过形成相互的聚合物/渗透性氢键来破坏干燥的PBI的氢键网络，从而增强了聚合物链的移动性。（DOI：10.1002 / pol.20200151）