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PMMA spectra

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FTIR <span class="search-highlight">spectra</span> of the pure and modified HNTs: (a) pristine HNTs; (b) HNT-SDS;...
Published: 01 December 2018
Fig. 3. FTIR spectra of the pure and modified HNTs: (a) pristine HNTs; (b) HNT-SDS; (c) HNT-PMMA; (d) HNT-COOH.
Journal Article
Journal: Clay Minerals
Published: 01 December 2007
Clay Minerals (2007) 42 (4): 463–470.
.... Lines 2–4), sharp peaks as well as broad peaks occurred, indicating that non-interacted hydroxyls were present. Correspondingly, the peaks of the C=O bond of PC also changed. The FTIR spectra was similar to that of liquid electrolytes, so it was again concluded that, in CPEs, the polymer matrix of PMMA...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2018
Clay Minerals (2018) 53 (4): 643–656.
...Fig. 3. FTIR spectra of the pure and modified HNTs: (a) pristine HNTs; (b) HNT-SDS; (c) HNT-PMMA; (d) HNT-COOH. ...
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Journal Article
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 736–744.
.... This is because the ionic radius of VI Fe 2+ becomes 20% shortened by the spin transition. At 53 GPa, the structure transforms to another high-pressure polymorph with Pmma symmetry with the ordered structure of Ti and Fe atoms in the octahedral site. This structure change results from the order-disorder...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2010
Clay Minerals (2010) 45 (4): 431–440.
... also improves the ion conductivity of the GPE (see Washington & King, 1997 ; Litas et al ., 2002; Golodnitsky et al ., 2001 ; Yuen et al ., 2007 ; Liang et al ., 2005 ). In our previous work (Huang et al. , 2007 , 2008a , b ) we demonstrated that, when compared with PMMA, the P(MMA...
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Journal Article
Published: 01 May 2011
Vadose Zone Journal (2011) 10 (2): 716–726.
... ( k.breede@fz-juelich.de ) 1 9 2010 Soil Science Society of America 2011 DC, direct current IP, induced polarization MSO, multistep outflow [method] PMMA, poly(methyl methacrylate) SIP, spectral induced polarization A novel experimental setup was developed to investigate...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2007
Clay Minerals (2007) 42 (1): 59–68.
... electrolytes (CPEs) which consisted of polymethyl methacrylate (PMMA) used as a polymer matrix, propylene carbonate (PC), used as a plasticizer, and LiClO 4 , used as a lithium ion producer. A variety of physical and chemical techniques was used to characterize the CPEs. The interlayer d spacing of OREC...
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Journal Article
Journal: Geophysics
Published: 16 February 2017
Geophysics (2017) 82 (2): M19–M36.
... developed the first seismic-frequency “room-dry” measurements of fracture-specific shear stiffness, using artificially fractured standard granite samples with different degrees of mating, a well-mated tensile fracture from a dolomite reservoir core, as well as simple roughened polymethyl methacrylate (PMMA...
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Journal Article
Published: 07 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (2): 387–400.
... ) Σ1.05 (Si 7.08 Al 0.99 S 0.09 ) Σ8.16 O 19 ·5H 2 O. The mineral is orthorhombic, crystallizing in the space group Pmma (No. 51), with a = 24.063(5), b = 6.9820(14), c = 6.5260(13) Å, V = 1096.4(4) Å 3 , Z = 2. The strongest six lines of the X-ray powder-diffraction pattern [ d in Å ( I ) ( hkl...
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Journal Article
Published: 01 October 2005
Mineralogical Magazine (2005) 69 (5): 643–652.
..., the specimen (still attached to the lids) placed in buffer for demineralization, and then repositioned on the stage for re-imaging. Successive scans give a set of registered 3-dimensional images of the process of mineral loss. Fourier transform infrared (FTIR) spectra were recorded (Perkin-Elmer...
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Journal Article
Published: 01 July 2018
Clays and Clay Minerals (2018) 66 (3): 233–244.
..., and enhance the lipophilicity of Mnt. In this way, the organically modified Mnt (OMnt) is easier to disperse in a polymer matrix and is more compatible with the organic phase ( He et al ., 2005 ). Al-Sabagh et al. (2016) successfully prepared poly(methylmethacrylate)/montmorillonite (PMMA/Mnt...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2008
Clay Minerals (2008) 43 (3): 405–413.
...) thermograms were recorded with a TA Instruments MDSC at a heating rate of 10°C/min under a nitrogen atmosphere. Thermogravimetric (TG) traces were recorded with SDT2960 DTA-TGA, ranging from 50 to 450°C, at a heating rate of 10°C/min under a nitrogen atmosphere. 1 H nuclear magnetic resonance (NMR) spectra...
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Journal Article
Published: 15 January 2024
Mineralogical Magazine (2024) 88 (2): 195–202.
...). c The occupancy was fixed in the final refinement cycles. Table 5. Selected interatomic distances (Å) in the structure of natromelansonite. Natromelansonite is pseudo-orthorhombic. Its monoclinic unit cell ( P 2 1 / m ) is very close to the orthorhombic cell ( Pmma...
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Journal Article
Published: 11 September 2012
European Journal of Mineralogy (2013) 25 (1): 97–111.
...). The unit-cell parameters and space group are: a = 5.4200(6), b = 11.064(1), c = 5.5383(7) Å, V= 332.12(1) Å 3 , Pmma, Z = 2. The calculated density is 3.84 g/cm 3 . The crystal structure of shulamitite has been refined from X-ray single-crystal data to R 1 = 0.029 %. No partitioning among octahedral sites...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2006
Clay Minerals (2006) 41 (2): 567–586.
... range. When the quadrupolar interaction becomes significant compared to the interaction with the magnetic field (Zeeman interaction), second-order quadrupolar perturbations that are not suppressed by MAS shift and broaden this signal. To obtain high-resolution spectra, appropriate techniques must...
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Journal Article
Published: 01 May 2010
American Mineralogist (2010) 95 (5-6): 880–883.
... group = Pmma ) ( Steinle-Neumann et al. 1999 ). With these k -point densities, the total energy converged to better than 1 meV/atom. The calculations were performed in the pressure range 0–400 GPa. Further details of the method used in our study have been described elsewhere ( Ono et al. 2008a...
FIGURES
Journal Article
Published: 01 August 2006
American Mineralogist (2006) 91 (8-9): 1378–1384.
... parameters of the two structures. As can be seen from Table 4 , the bond lengths between the corresponding sites in the two structures are identical within 0.09 Å. Raman spectra of tyrolite samples were recorded using the Jobin-Yvon Labpah-HR 800 spectrometer. The spectra were found to be in close...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2003
Clay Minerals (2003) 38 (1): 49–61.
... of 0.5 μs, a recycle time 1 s, and 200 acquisitions. The chemical shift was referenced to a 0.1 m aqueous solution of Al(NO 3 ). The 29 Si one-pulse spectra were recorded at 7.04 T with a spinning rate of 4.5 kHz. For one-pulse experiments, the π/2 pulse duration was 2.5 μs, the recycle time was 5 s...
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Journal Article
Published: 17 September 2021
Mineralogical Magazine (2021) 85 (5): 708–715.
..., rinsed with water (3 × 10 ml), EtOH abs. (2 × 10 ml) and Et 2 O (2 × 10 ml), and dried over silica gel. The yield was 1.95 g (20% based on Cu) of a blue-grey powder. The infrared (IR) spectra, collected on a Specac Golden Gate ATR device, identified the following bands (vs = very strong): ν = 3609, 3425...
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Journal Article
Published: 09 May 2024
American Mineralogist (2024)
.... httpwww.minsocam.org/ the ordered Pmma CaTi2O4-type phase and the Fo-III type phase. Although the simulated patterns for the two are similar, the Fo-III type structure (CIF on deposit, optimized DFT structure at 60 GPa) is a better match (fewer peaks) and comparatively lower enthalpy. Post-spinel (e.g. CaMn2O4...