The present paper deals with the synthesis and characterization of crystalline polyaniline (PANI). In the present work the crystalline PANI was synthesized in two steps. Firstly, the amorphous polyaniline was prepared by co-precipitation method using aniline as precursor and ammonium peroxodisulfate as reagent. In second stage the crystalline PANI was prepared by the melting and slow cooling. Pellets of PANI were prepared at pressure of 3000-4000 kg/cm². The resulting crystalline PANI was characterized by powder X-ray diffraction (PXRD), atomic force microscopy (AFM) and transmission electron microscopy (TEM). The PXRD pattern confirms the crystalline behaviour of PANI. The AFM results also support PXRD result due to presence of tiny crystals on the surface of PANI. TEM analysis reveals various nanorings connecting the characteristics diffraction spots of PANI nanoparticles.

中文翻译：

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结晶聚苯胺的合成与表征

本文涉及结晶聚苯胺（PANI）的合成和表征。在本工作中，结晶的PANI分两步合成。首先，以苯胺为前驱体，过二硫酸铵为试剂，通过共沉淀法制备了非晶态聚苯胺。在第二阶段，通过熔融和缓慢冷却来制备结晶PANI。在3000-4000 kg / cm ^2的压力下制备PANI颗粒。通过粉末X射线衍射（PXRD），原子力显微镜（AFM）和透射电子显微镜（TEM）表征所得的结晶PANI。PXRD图证实了PANI的结晶行为。由于PANI表面上存在微小晶体，因此AFM结果也支持PXRD结果。TEM分析显示，各种纳米环连接了PANI纳米粒子的特征衍射点。