Polydapsone is a promising polymer that has been prepared mainly as copolymers. Due to the similarity of dapsone monomer to aniline, its polymerization has been carried out in the same conditions as in the synthesis of polyaniline, but unlike this one, polydapsone chemical structure and properties are still not fully known. In this paper, polydapsone was synthesized by oxidative polymerization in an aqueous HCl medium, using ammonium persulfate as the oxidizer agent. It was observed that carrying the synthesis both at room temperature and for 48 h resulted in higher yields than at 5 °C or for 24 h. The molar ratio of dapsone:oxidant also increased the reaction yield with the increase in oxidant content, and the stoichiometric ratio of 1:4 led to the best results. Fourier transform infrared and Raman spectroscopies summed to density functional theory calculations revealed that the polymerization of dapsone occurs via amino-amino coupling with the formation of protonated amines and that the Cl⁻ counterions take part in the structure. Ultraviolet spectroscopy showed no significant differences between the monomer and the polymer, suggesting that polydapsone has a semiconductor character. X-ray diffraction revealed a semicrystalline morphology that appears only when the polymer is in its protonated form, at the same time that its thermal stability increases with deprotonation, as shown by thermal analysis. This approach allowed us to suggest a chemical structure for polydapsone and correlate the synthesis parameters with the chemical and crystalline structures and further with some physicochemical properties.

聚氨苯砜是一种有前途的聚合物，主要制成共聚物。由于氨苯砜单体与苯胺的相似性，其聚合反应是在与聚苯胺合成相同的条件下进行的，但与这一方法不同，聚氨苯砜的化学结构和性质仍不完全清楚。在本文中，使用过硫酸铵作为氧化剂，在HCl水溶液中通过氧化聚合反应合成了聚氨苯砜。观察到在室温和48小时下进行合成均比在5℃或24小时下产生更高的产率。氨苯砜：氧化剂的摩尔比也随着氧化剂含量的增加而增加了反应产率，化学计量比为1：4导致了最佳结果。⁻抗衡离子参与结构。紫外线光谱显示单体和聚合物之间没有显着差异，表明聚氨苯砜具有半导体特性。X射线衍射揭示了仅当聚合物为质子化形式时才出现的半结晶形态，同时其热稳定性随着去质子化而增加，如热分析所示。这种方法使我们能够提出聚氨苯砜的化学结构，并将合成参数与化学和晶体结构相关联，并进一步与某些物理化学性质相关联。