Effect of solvents on the morphology of PMMA films fabricated by spin-coating

Padilha, Giovana da Silva; Giacon, Virgínia Mansanares; Bartoli, Júlio Roberto

doi:10.1590/0104-1428.12516

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…Figure 1 shows the maximum measured UV-visible transmittance for pristine PMMA as 87.4% at 600 nm wavelength, slightly lower than the 92% reference value for PMMA at 600 nm in other works [23,24,[41][42][43] , which is associated to heterogeneities due to the casting process and possible solvent or monomer residues [45,46] . On the other hand, the maximum transmittances on visible light for the nanocomposites films were close to pristine PMMA films.…”

Section: Uv-vis Transmittancementioning

confidence: 72%

“…The obtained values enable usage of these materials in optical devices. It should be noted that the lowest intrinsic losses by light absorption in PMMA, due to the harmonics of molecular vibrational absorption in C−H bonds, appear at 506 nm, 568 nm, and 650 nm [38,[40][41][42][43][44][45][46][47] , hence, wavelengths…”

Section: Uv-vis Transmittancementioning

confidence: 99%

“…Therefore, since matching the refractive indexes of particles and matrix is impossible, reduction of losses due to light scattering in composites depends on their phase domains being smaller than light wavelength [46][47][48][49][50] . The lower the Δn between particles and matrix refractive indexes, the less significant is the scattering effect [38,[46][47][48][49][50] .…”

Section: Refractive Indexmentioning

confidence: 99%

“…Reinforcement resulted by adding silica nanoparticles to amorphous polymers stems mainly from molecular stiffening of polymer chains due to interactions with nanoparticles, which show larger surface area interacting with these chains, increasing their physical adsorption [40][41][42][43][44][45] . Light's wavelength is higher than particles nanometric size, therefore, these particles would not influence the optical properties of the nanocomposites [46] . Polar OH groups on silica particles also interact with the dipoles on PMMA pendant groups through Van der Waals interactions.…”

Section: Introductionmentioning

confidence: 99%

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Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices

et al. 2022

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PMMA is one of the most used polymers for optical applications, due to its well-known optical properties and low-cost. PMMA/fumed silica nanocomposites were synthesized by in situ polymerization under sonication to produce optical materials using two types of silica, a PDMS surface-modified and an unmodified one. Silica content and sonication amplitude effects on nanocomposites properties were studied by factorial experimental designs. Nanocomposites retained the high transparency of pristine PMMA, especially at lower levels of silica and sonication. Rheological analysis indicated better dispersion of the unmodified silica in PMMA. Dispersed silica in the PMMA nanocomposites decreased the PMMA refractive index by 0.012, making PMMA/fumed silica suitable for the cladding layer of PMMAcore waveguides, resulting in the total reflectance phenomenon for light guiding. Therefore, PMMA/fumed silica nanocomposites provide promising materials for polymer optical devices, such as optical fibers and panels, optical sensors and biosensors, photonic platforms, daylighting, and multi-touchscreen displays.

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Section: Uv-vis Transmittancementioning

confidence: 72%

Section: Uv-vis Transmittancementioning

confidence: 99%

Section: Refractive Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices

et al. 2022

Self Cite

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“…This material has many purposes and serves good for restoration but has poor scratch resistance [9]. PMMA is prefered in the restorative field for its lightweight, transparency, low cost [10] and they even produce low oxidative stress which reduces the incidence of periodontitis. PMMA has also shown its side effects like COVID-19 on the cardiovascular system by inducing hypotension and bradycardia.…”

Section: Open Accessmentioning

confidence: 99%

Effects Of Dentifrices On Surface Properties Of Cad - Cam Manufactured Temporary Restorative Materials

S.M¹

2021

IJDOS

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A wide integration of computer aided design (CAD) and computer aided manufacturing (CAM) in dentistry, an increasingly large number of novel technical and clinical protocols have been introduced for provisional restorations manufacturing in a digital workflow [5]. The CAD-CAM aided monolithic materials are preferred as they reduce the time of manufacturing and decrease the number of appointments [6]. The need for polishing any CAD-CAM manufactured restorative materials is to eliminate the surface defects caused by the machine and to reduce the surface roughness on the external surface of the restorative material [7].

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A study of the diimmonium dyes employing bis(fluorosulfonyl)imide anions for NIR absorbing film of CMOS image sensor

Kim

Lee

et al. 2021

Dyes and Pigments

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Effect of solvents on the morphology of PMMA films fabricated by spin-coating

Cited by 9 publications

References 24 publications

Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices

Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices

Effects Of Dentifrices On Surface Properties Of Cad - Cam Manufactured Temporary Restorative Materials

A study of the diimmonium dyes employing bis(fluorosulfonyl)imide anions for NIR absorbing film of CMOS image sensor

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