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首页> 外文期刊>Bulletin of Materials Science >Structural, thermal and optical properties of Cu2+ doped methacrylic acid-ethyl acrylate (MAA:EA) copolymer films
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Structural, thermal and optical properties of Cu2+ doped methacrylic acid-ethyl acrylate (MAA:EA) copolymer films

机译：Cu2 +掺杂甲基丙烯酸乙基丙烯酸乙酯（MAA：EA）共聚物膜的结构，热和光学性质

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摘要

Pure and Cu2+ doped methacrylic acid-ethyl acrylate (MAA: EA) copolymer films were prepared using the solution cast technique. The amorphous feature of the copolymer was depicted using X-ray diffraction scans and degree of crystallinity was found to vary with increasing doping content. UV-Vis absorption spectra in the wavelength region 200-900nm were used to evaluate the optical properties like direct band gap, indirect band gap and absorption edge. The optical band gap decreased with the increase of mol% of Cu2+ ions. Fourier transform infrared spectral studies on pure MAA: EA and Cu2+ ions-doped films revealed the vibrational changes that occurred due to the effect of dopant salt in the copolymer. Thermal properties of these films were investigated by employing differential scanning calorimetry and thermogravimetric analysis. The variation in film morphology was examined by scanning electron microscopy. Electron paramagnetic resonance (EPR) spectra of all the doped samples exhibited signals due to Cu2+ ions with the effective g-values g parallel to = 2.177 and g perpendicular to = 2.058. The observed variation in the EPR signal intensity is due to the isolated and aggregated copper ions. The photoluminescence spectra of Cu2+ ions-doped MAA: EA copolymer exhibited four emission peaks at 480 (blue), 579 (yellow), 604 (red) and 671 nm (red).
机译：使用溶液浇铸技术制备纯和Cu2 +掺杂甲基丙烯酸 - 丙烯酸丙烯酸酯（MAA：EA）共聚物膜。使用X射线衍射扫描描述共聚物的无定形特征，并发现结晶度随着掺杂含量的增加而变化。波长区域200-900nm中的UV-Vis吸收光谱用于评估直接带隙，间接带隙和吸收边缘的光学性质。随着Cu 2 +离子的摩尔％的增加，光带间隙降低。纯MAA的傅里叶变换红外光谱研究：EA和Cu2 +离子掺杂薄膜揭示了由于掺杂剂盐在共聚物中发生的振动变化。通过采用差示扫描量热法和热重分析来研究这些薄膜的热性能。通过扫描电子显微镜检查膜形态的变化。所有掺杂样品的电子顺磁共振（EPR）光谱表现出由于Cu 2 +离子引起的信号，其中有效的G值G平行于= 2.177和垂直于= 2.058。观察到的EPR信号强度的变化是由于分离和聚集的铜离子。 Cu2 +离子掺杂Maa的光致发光光谱：EA共聚物在480（蓝色），579（黄色），604（红色）和671nm（红色）上表现出四个发射峰。

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