Dye doped polymer films of poly(methyl methacrylate) (PMMA) and brilliant cresyl blue (BCB) dye were synthesized using the solution casting technique. This work aims to investigate the influence of BCB dye doping on the structural, optical, dielectric and mechanical properties of PMMA. XRD reveals an increase in PMMA amorphicity with BCB loading. This suggests the solubility of BCB dye within PMMA. Fourier transform IR confirms the interaction between BCB dye and PMMA. The transmittance T of PMMA decreases with BCB doping and the cut‐off transmission occurs in the ranges 200–366 nm and 560–660 nm for 2 wt% BCB doped film. The absorbance of PMMA deceases with λ and loading BCB creates many absorption edges. The optical bandgaps of dye doped films are lower than that of PMMA. Urbach's energy increases from 0.52 to 0.86 eV on BCB doping. The dielectric constant ε′, dielectric loss ε″ and AC conductivity σ_ac at room temperature as a function of frequency f, 100 Hz to1.0 MHz, and the doping level were studied. Loading dye increases σ_ac to higher values. The optical limiting results indicate that the dye doped films are highly attenuated for a laser beam of 638.2 nm. The dye incorporation enhances the mechanical performance of PMMA. It increases Young's modulus, tensile strength and elongation at break, which boosts the use of 1 wt% BCB doped film as a flexible laser attenuator. The excellent characteristics of novel BCB dye doped PMMA films present them as cut‐off laser filters, laser attenuators, optoelectronic devices or in the semiconductor industry. © 2020 Society of Industrial Chemistry

中文翻译：

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作为选择性截止激光滤光片的新型灿烂甲酚蓝染料掺杂聚甲基丙烯酸甲酯的电学和光学性质

利用溶液流延技术合成了聚甲基丙烯酸甲酯（PMMA）和亮甲酚蓝（BCB）染料的聚合物薄膜。这项工作旨在研究BCB染料掺杂对PMMA的结构，光学，介电和机械性能的影响。XRD显示，随着BCB的加入，PMMA的非晶性增加。这表明BCB染料在PMMA中的溶解度。傅里叶变换红外光谱证实了BCB染料和PMMA之间的相互作用。PMMA的透射率T随着BCB掺杂的增加而降低，截止透射率发生在200-366 nm和560-660 nm范围内（掺杂2 wt％的BCB）。PMMA的吸光度随λ降低负载BCB会产生许多吸收边缘。染料掺杂薄膜的光学带隙低于PMMA。掺杂BCB时，Urbach的能量从0.52 eV增加到0.86 eV。介电常数ε '，介电损耗ε “和AC电导率σ_交流在室温下作为频率的函数˚F，100赫兹〜1.0兆赫，并且掺杂水平进行了研究。样染料增加σ_交流更高的价值。光学极限结果表明，对于638.2 nm的激光束，染料掺杂膜被高度衰减。染料的引入增强了PMMA的机械性能。它增加了杨氏模量，抗张强度和断裂伸长率，从而促进了使用1 wt％的BCB掺杂薄膜作为柔性激光衰减器。新型BCB染料掺杂的PMMA薄膜的优异特性使其可以用作截止激光滤光片，激光衰减器，光电器件或半导体行业。©2020工业化学学会