scholarly journals Development of a simultaneous measurement system for SAXS–WAXD and the thickness of coating films during film formation by solvent evaporation

2014 ◽  
Vol 47 (1) ◽  
pp. 476-481 ◽  
Author(s):  
Keisuke Shimokita ◽  
Tsukasa Miyazaki ◽  
Hiroki Ogawa ◽  
Katsuhiro Yamamoto
Keyword(s):  
Methyl Methacrylate ◽  
Formation Process ◽  
Simultaneous Measurement ◽  
Film Formation ◽  
Solvent Evaporation ◽  
Coating Film ◽  
Coating Films ◽  
X Ray ◽  
Poly Methyl Methacrylate ◽  
X Ray Absorption

A system for the simultaneous measurement of small-angle X-ray scattering and wide-angle X-ray diffraction (SAXS–WAXD) and the thickness of a coating film, obtained with an automatic coater, during film formation has been developed. The system was installed on beamline BL03XU at SPring-8. As model specimens, poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) (PMMA-b-PnBA-b-PMMA) triblock copolymers with different compositions were used to investigate the film formation process during solvent evaporation. First of all, the data correction methods were examined for the coating films during solvent evaporation. Since the scattering invariant was affected by the scattering volume and the absorption of X-rays by the solvent and the copolymer during drying, the scattering invariant should be corrected for the film width and the X-ray absorption of the sample. The polymer concentration was estimated from the thickness of the coating film during solvent evaporation, while the X-ray absorption was evaluated by using the X-ray linear absorption coefficients of the solvent and the copolymer. The results showed that the correction of the scattering invariant is crucial for an exact description of the film formation process during solvent evaporation.

scholarly journals Evaluation of Coating Film Formation Process Using the Fluorescence Method

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1076
Author(s):  
Ayako Yano ◽  
Kyoichi Hamada ◽  
Kenji Amagai
Keyword(s):  
Film Thickness ◽  
Formation Process ◽  
Film Formation ◽  
Injection Pressure ◽  
Measurement Range ◽  
Fluorescence Method ◽  
Coating Film ◽  
Coating Films ◽  
Tracer Particles ◽  
Overlap Ratio

In this paper, we invented a novel observation method of the coating film formation process using the fluorescence method. With this method, the temporal change in the coating film thickness can be evaluated quantitatively. In addition, since the thickness and flow of the coating film can be measured simultaneously, the detailed coating film formation process was clarified. In the experiment, the adhesion behavior of the spray-paint droplets when applied to a wall was investigated. The characteristics of coating films formed by the spray droplets, particularly the influence of injection pressure on the coating film formation, were determined using the fluorescence method. At the initial stage of the coating process, the coating area increased linearly. When the ratio of the coating area to the measurement range reached about 80%, the rate at which the coating area increased slowed down, and an overlap began. The amount of paint that adhered to the coating film formation could be estimated by calculating the overlap ratio. Moreover, the thickness and smoothness of the coating film were evaluated using the histogram data of the fluorescence intensity. The leveling process was discussed in relation to the standard deviation of the histogram data. In addition, the flow of the paint during the coating film formation was investigated using tracer particles, and the effect of the spray gun injection pressure on the leveling process was investigated. Changes in the film thickness and flow during the coating film formation process could be evaluated through fluorescence observation.

Properties of Carbon Nanofibers Prepared from Polyacrylonitrile/Poly(methyl Methacrylate) Blend

2009 ◽  
Vol 79-82 ◽  
pp. 353-356
Author(s):  
Wei Pan ◽  
Yan Chen ◽  
Xiao Wei He
Keyword(s):  
Methyl Methacrylate ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Nitrogen Atmosphere ◽  
Wet Spinning ◽  
X Ray Diffraction ◽  
X Ray ◽  
Poly Methyl Methacrylate ◽  
Graphite Crystallite ◽  
Raman Microspectrometry

The polyacrylonitrile(PAN)/poly (methyl methacrylate)(PMMA) blend fibers were prepared by wet-spinning technique and carbonized over the temperature range of 400-1000°C in nitrogen atmosphere. After carbonization of the blend fibers, the PMMA component removed and the PAN component left in the form of carbon nanofibers. Morphology of the carbon nanofibers were investigated via scanning electron microscopy (SEM), and the carbonization behavior of the fibers were examined via x-ray diffraction (XRD), Raman microspectrometry. The optimal condition made carbon fibers with great L/D ratio and diameter less than 200 nm. XRD and Raman spectra shows that the PAN/PMMA blend fibers treated at 600°C produced some graphite crystallite.

Control by Mixed-Chloride Additives of the Quality and Homogeneity of Bulk Halide Perovskite upon Film Formation Process

2021 ◽  
Author(s):  
Thierry Pauporté ◽  
Daming zheng
Keyword(s):  
Solar Cells ◽  
Formation Process ◽  
High Efficiency ◽  
Film Formation ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stability Issue ◽  
Halide Perovskite ◽  
The Stability

Nowadays, overcoming the stability issue of perovskite solar cells (PSCs) while keeping high efficiency has become an urgent need for the future of this technology. By using x-ray diffraction (XRD),...

Film formation of poly (methyl methacrylate) latex with pyrene functional poly (divinylbenzene) microspheres prepared by click chemistry

2011 ◽  
Vol 32 (6) ◽  
pp. 869-881 ◽  
Author(s):  
Şaziye Uğur ◽  
Önder Yargı ◽  
Yasemin Yüksel Durmaz ◽  
Bünyamin Karagöz ◽  
Niyazi Bıçak ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Click Chemistry ◽  
Film Formation ◽  
Poly Methyl Methacrylate

Small-angle x-ray scattering investigation of poly(methyl methacrylate)-alumina nanocomposite

2019 ◽  
Author(s):  
Jitendra Bahadur ◽  
S. K. Sharma ◽  
Avik Das ◽  
Debasis Sen ◽  
P. K. Pujari
Keyword(s):  
Methyl Methacrylate ◽  
Small Angle ◽  
X Ray ◽  
Poly Methyl Methacrylate ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals X-ray-Induced Production of Gold Nanoparticles on a SiO2/Si System and in a Poly(methyl methacrylate) Matrix

Langmuir ◽  
2005 ◽  
Vol 21 (1) ◽  
pp. 437-442 ◽  
Author(s):  
Ferdi Karadas ◽  
Gulay Ertas ◽  
Eda Ozkaraoglu ◽  
Sefik Suzer
Keyword(s):  
Gold Nanoparticles ◽  
Methyl Methacrylate ◽  
X Ray ◽  
Poly Methyl Methacrylate
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