Three-dimensional observation of phase-separated poly(methyl methacrylate)/poly(styrene-ran-4-bromostylene) blends by 3D NMR microscopy with X-ray microscopy

2006 ◽  
Vol 103 (1) ◽  
pp. 470-475 ◽  
Author(s):  
Satoshi Koizumi ◽  
Yuji Yamane ◽  
Shigeki Kuroki ◽  
Isao Ando ◽  
Yukihiro Nishikawa ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Three Dimensional ◽  
3D Nmr ◽  
Nmr Microscopy ◽  
X Ray ◽  
Poly Methyl Methacrylate

scholarly journals Grafting Poly(Methyl Methacrylate) (PMMA) from Cork via Atom Transfer Radical Polymerization (ATRP) towards Higher Quality of Three-Dimensional (3D) Printed PMMA/Cork-g-PMMA Materials

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1867
Author(s):  
Paula S. S. Lacerda ◽  
Nuno Gama ◽  
Carmen S. R. Freire ◽  
Armando J. D. Silvestre ◽  
Ana Barros-Timmons
Keyword(s):  
Solid State ◽  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Three Dimensional ◽  
Flow Index ◽  
Atom Transfer ◽  
X Ray ◽  
Poly Methyl Methacrylate ◽  
3D Printed

Cork is a unique material and its by-products are attracting an ever-growing interest for preparing new materials in an attempt to extend the outstanding properties of cork toward innovative and high value applications. Yet, the miscibility of cork particles with thermoplastic matrices is not easy due to its low density and surface properties. Here, cork is functionalized with poly(methyl methacrylate) (PMMA) via atom transfer radical polymerization (ATRP) to yield cork grafted with PMMA chains particles (cork-g-PMMA). Both the ATRP macroinitiator and the cork-g-PMMA obtained are fully characterized by Fourier-transform infrared spectroscopy (FT-IR), 13C cross-polarized magic-angle spinning solid-state nuclear magnetic resonance (13C CP/MAS solid state NMR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD) and thermogravimetric analyses (TGA). The functionalized cork particles are then blended with commercial PMMA to afford cork-g-PMMA/PMMA. To compare, cork also is mixed with PMMA and the ensuing cork/PMMA sample and its morphology, thermal, and mechanical properties are compared with those of cork-g-PMMA/PMMA and commercial PMMA. The cork surface modification via ATRP of the methyl methacrylate (MMA) yields better dispersion in the matrix. Consequently, a blend with enhanced mechanical performance, higher thermal stability, and a higher melt flow index (MFI) is obtained when compared to the blend prepared using unmodified particles. The similarity of the MFI of cork-g-PMMA/PMMA to that of PMMA suggests good printability. Indeed, a three-dimensional (3D) printed specimen is obtained confirming that grafting using ATRP is a promising route for the preparation of high quality 3D printed products.

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.

scholarly journals Three-Dimensional Nano-Morphology of Carbon Nanotube/Epoxy Filled Poly(methyl methacrylate) Microcapsules

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1387 ◽  
Author(s):  
M. Galip Icduygu ◽  
Meltem Asilturk ◽  
M. Akif Yalcinkaya ◽  
Youssef K. Hamidi ◽  
M. Cengiz Altan
Keyword(s):  
Confocal Microscopy ◽  
Methyl Methacrylate ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Laser Scanning Confocal Microscopy ◽  
Poly Methyl Methacrylate ◽  
Scanning Confocal Microscopy ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Average Size

The three-dimensional nano-morphology of poly(methyl methacrylate; PMMA) microcapsules filled with carbon nanotubes (CNTs) and epoxy resin were investigated by various microscopy methods, including a novel, laser scanning confocal microscopy (LSCM) method. Initially, PMMA microcapsules containing various amounts of CNTs were synthesized by a solvent evaporation method. Scanning electron microscopy analysis showed that pore-free, smooth-surface microcapsules formed with various types of core-shell morphologies. The average size of CNT/epoxy/PMMA microcapsules was shown to decrease from ~52 μm to ~15 μm when mixing speed during synthesis increased from 300 rpm to 1000 rpm. In general, the presence of CNTs resulted in slightly larger microcapsules and higher variations in size. Moreover, three-dimensional scans obtained from confocal microscopy revealed that higher CNT content increased the occurrence and size of CNT aggregates inside the microcapsules. Entrapped submicron air bubbles were also observed inside most microcapsules, particularly within those with higher CNT content.

scholarly journals Poly(methyl methacrylate) Coating of Titanium Workpieces to Reduce Burrs in Micro-drilling

Micromachines ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 838
Author(s):  
Luca Giorleo
Keyword(s):  
Methyl Methacrylate ◽  
Three Dimensional ◽  
Titanium Sheet ◽  
Burr Height ◽  
Poly Methyl Methacrylate ◽  
Drill Bits ◽  
Micro Drilling ◽  
Quantitative Analyses ◽  
Uncoated Titanium ◽  
Titanium Specimen

A technique to reduce burr height in titanium micro-drilling is presented: a poly (methyl methacrylate) coating was applied before machining on the upper and lower surfaces of a titanium specimen (0.5-mm thick). After drilling, a cleaning process (acetone bath) was executed to eliminate the coating, and holes with less burr were obtained. The coating process was executed with a spin-coating machine. To test the efficacy of the technique, two different coating thicknesses (7.9 and 5.4 μm) and two drill bits (0.25- and 0.5-mm diameter) were evaluated. Qualitative and quantitative analyses of the holes obtained were performed with scanning electron microscopy and three-dimensional microscopy, respectively. The results highlight the efficacy of the technique to reduce the burr height by 70% in coated titanium relative to that in an uncoated titanium sheet.

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

Three-Dimensional Optical Bit Memory in Sm(DBM)3Phen-Doped and Un-Doped Poly(methyl methacrylate)

2011 ◽  
Vol 284-286 ◽  
pp. 2251-2254
Author(s):  
Zhao Gang Nie ◽  
Xin Zhong Li ◽  
Yu Ping Tai ◽  
Ki Soo Lim ◽  
Myeongkyu Lee
Keyword(s):  
Refractive Index ◽  
Methyl Methacrylate ◽  
Signal To Noise Ratio ◽  
Three Dimensional ◽  
Pulsed Laser ◽  
High Signal ◽  
Signal To Noise ◽  
Fluorescent Signal ◽  
Poly Methyl Methacrylate ◽  
Noise Ratio

The feasibility of three-dimensional optical bit memory is demonstrated by using the change of fluorescence and refractive index in Sm(DBM)3Phen-doped and un-doped Poly(methyl methacrylate). After a femtosecond pulsed laser irradiation, a refractive-index bit and a fluorescent bit can be formed at the same position inside the bulk sample. Multilayer patterns recorded by tightly focusing the pulsed laser beam were read out by a reflection-type fluorescent confocal microscope, which can detect the reflection signal and also the fluorescent signal of the stored bits. The signal-to-noise ratio via the two retrieval modes was compared as a function of recording depth. The stored bits were retrieved with a high signal-to-noise ratio in the absence of any crosstalk and the detection of the fluorescent signal enables retrieval of the stored bits with a higher S/N ratio.

Crystallite modulus of double-stranded helices of isotactic poly(methyl methacrylate): the X-ray measurement and the theoretical calculation

Polymer ◽  
1999 ◽  
Vol 40 (12) ◽  
pp. 3345-3351 ◽  
Author(s):  
Sebastien Urbanek ◽  
Kohji Tashiro ◽  
Tatsuki Kitayama ◽  
Koichi Hatada
Keyword(s):  
Methyl Methacrylate ◽  
Theoretical Calculation ◽  
X Ray ◽  
Poly Methyl Methacrylate
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