Youhai Yu and colleagues, in their article on page 1942, synthesize a novel bisbenzimidazole based diamine. The derived polyimides exhibit a lower coefficient of thermal expansion and water absorption than traditional PABZ based polyimide, which is considered to be the result of the synergistic effect of intermolecular and intramolecular hydrogen bonding. (DOI: 10.1002/pol.20210305)

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内封面

Youhai Yu 及其同事在他们第 1942 页的文章中合成了一种新型的基于双苯并咪唑的二胺。衍生的聚酰亚胺比传统的基于PABZ的聚酰亚胺具有更低的热膨胀系数和吸水率，这被认为是分子间和分子内氢键协同作用的结果。（DOI：10.1002/pol.20210305）