Chemical interaction of stains on polymethylmethacrylate used for maxillofacial prosthesis: A spectroscopic analysis

Kumar, K Ram; Vanitha, R; Thulasingam, C; Nasser, K.S.G.A; Kumar, Surinder; Sunitha, P.

doi:10.4103/0972-4052.49018

Cited by 3 publications

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“…9 These special characteristics recommend PMMA for several applications such as nonlinear optics 10 and medical applications. 11 Rawat et al reported the possibility of using PMMA/ZnO composites in museums and art galleries to block harmful UV radiation falling on sensitive museum objects. 12 Furthermore, PMMA-CdSe/ZnS composites can be used as highly fluorescent yellow emitting nanophosphors.…”

Section: Introductionmentioning

confidence: 99%

“…It attracts considerable attention owing to its low cost, high optical transparency, high resistance to sunlight, low optical loss in the visible spectrum, shape‐forming property, low glass transition temperature ( T g ), excellent insulation properties and high thermal stability 9 . These special characteristics recommend PMMA for several applications such as nonlinear optics 10 and medical applications 11 . Rawat et al .…”

Section: Introductionmentioning

confidence: 99%

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

El‐Gamal

Ismail

2020

Polymer International

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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.

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