Electrical and optical properties of novel brilliant cresyl blue dye‐doped poly(methyl methacrylate) as selective cut‐off laser filters

Abstract

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 cutoff transmission occurs in the ranges 200-366 nm and 560-660 nm for 2 wt% BCB doped film. The absorbance of PMMA deceases with ⊗ 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 0 , dielectric loss ε 00 and AC conductivity ⊞ ac at room temperature as a function of frequency f, 100 Hz to1.0 MHz, and the doping level were studied. Loading dye increases ⊞ 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 cutoff laser filters, laser attenuators, optoelectronic devices or in the semiconductor industry.

Enhancing the microstructural, optical, and tensile properties of the PVC‐PMMA blend film: The role of PbO nanoparticles incorporation

“…Firstly, it should be mentioned that the tensile test is considered an efficient and heavily used mechanical test in the case of polymeric systems 61–64 . This test helps in finding important parameters.…”

“…For example, at 2 wt.% PbO, these values are 1988 MPa, 56.5 MPa, and 6.9%, respectively. Knowing that pure PVC has a tensile strength of 48.4 MPa 66 and pure PMMA has a tensile strength of 16.26 MPa 63 . In detail, the improvement in E with loading could be due to the better distribution of the PbO NPs within the blend film, which limits the mobility (motion) of the polymer chains (as seen in SEM images).…”

“…Firstly, it should be mentioned that the tensile test is considered an efficient and heavily used mechanical test in the case of polymeric systems. [61][62][63][64] This test helps in finding important parameters. From surveying the literature, it was found that the tensile properties of blend and PNC films depend on: (i) The dispersion of nanofillers.…”

“…Knowing that pure PVC has a tensile strength of 48.4 MPa 66 and pure PMMA has a tensile strength of 16.26 MPa. 63 In detail, the improvement in E with loading could be due to the better distribution of the PbO NPs within the blend film, which limits the mobility (motion) of the polymer chains (as seen in SEM images). The interfacial interaction of these nanoparticles with the blend chain segments is another factor.…”

Polymer/dye blends: Preparation and optical performance: A short review

“…44 Another two recent studies investigated polymer/dye blends featuring PMMA (Figure 2). In the first study, El-Gamal et al 45 prepared brilliant cresyl blue dye (BCB)-doped PMMA films with different concentrations of BCB, ranging from 0.2 to 2 wt%, by solution casting. They revealed that BCB is soluble in the PMMA matrix; however, the introduction of 2 wt% BCB reduces the crystallinity of PMMA from 32 to 11.9%.…”