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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of the Electropolymerization of o-Toluldine and p-Phenylenediamine and Their Electrocopolymerization by In Situ Ultraviolet-Visible Spectro electrochemistry
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Investigation of the Electropolymerization of o-Toluldine and p-Phenylenediamine and Their Electrocopolymerization by In Situ Ultraviolet-Visible Spectro electrochemistry

机译：原位紫外-可见光谱电化学研究邻苯二酚和对苯二胺的电聚合及其电共聚合

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摘要

Under the conditions of potentiostatic electrolysis, the electropolymerization of o-toluidine (OT) and para-phenylenediamine (PPDA) and the electrocopolymerization between OT and PPDA on an indium tin oxide (ITO) conductive glass electrode at potentials of 0.7, 0.8, and 0.9 V were studied in detail by in situ ultraviolet-visible (UV-vis) spectrometry in 0.5 mol/L sulfuric acid media. It was shown that both OT and PPDA could be electropolymerized on the ITO electrode, which depended on the applied electrolysis potential and the concentration of the monomer. Furthermore, in situ UV-vis spectra indicated that the electrocopolymerization between OT and PPDA could happen. The presence of PPDA not only promoted polymerization but also accelerated polymerization, which was attributed to the formation of an intermediate result from the coupling of PPDA and the toluidine monomer cation radical. PPDA could be incorporated into the copolymer to make the copolymer have a phenazine or phenazine-like cyclic structure, which was proven by the reflectance Fourier transform infrared spectra of the polymer and copolymer. The scanning electron microscopy morphology images of the polymers obtained showed that, in addition to accelerating polymerization, PPDA also could change the method of nucleation for the polymer to make the copolymer possess a fibrous surface morphology. The diameter of the fibroid copolymer was about 100 nm, and the length of that reached about 1000 nm. In the article, a newer concerned mechanism of copolymerization was proposed.
机译：在恒电位电解的条件下，邻甲苯胺（OT）和对苯二胺（PPDA）的电聚合以及OT和PPDA在铟锡氧化物（ITO）导电玻璃电极上的电共聚电势分别为0.7、0.8和0.9通过在0.5 mol / L硫酸介质中的原位紫外-可见（UV-vis）光谱对V进行了详细研究。结果表明，OT和PPDA均可在ITO电极上电聚合，这取决于所施加的电解电势和单体的浓度。此外，原位紫外-可见光谱表明OT和PPDA之间可能发生电共聚。 PPDA的存在不仅促进聚合，而且促进聚合，这归因于PPDA和甲苯胺单体阳离子自由基偶联形成的中间结果。可以将PPDA掺入共聚物中，以使共聚物具有吩嗪或类吩嗪的环状结构，这已通过聚合物和共聚物的傅立叶反射红外光谱证明。所获得的聚合物的扫描电子显微镜形态图像显示，PPDA除了促进聚合之外，还可以改变聚合物的成核方法，以使共聚物具有纤维状表面形态。肌瘤共聚物的直径为约100nm，并且其长度达到约1000nm。在本文中，提出了一种较新的关注的共聚机理。

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