scholarly journals Thermal analysis study of polymer-to-ceramic conversion of organosilicon precursors

2008 ◽  
Vol 44 (1) ◽  
pp. 35-38 ◽  
Author(s):  
D. Galusek ◽  
Z. Lencés ◽  
P. Sajgalík ◽  
Ralf Riedel
Keyword(s):  
Thermal Analysis ◽  
Mechanical Analysis ◽  
Cross Linking ◽  
Oxide Ceramics ◽  
Ceramic Yield ◽  
Scanning Calorimetry ◽  
Analysis Study ◽  
Thermal Analysis Study ◽  
Thermal Mechanical Analysis ◽  
Significant Attention

The organosilicon precursors attract significant attention as substances, which upon heating in inert or reactive atmosphere convert directly to oxide or non-oxide ceramics, like nitrides, carbides, carbonitrides, boroncarbonitrides, oxycarbides, alons, etc. In characterisation, and in study of conversion of these polymers to ceramics thermal analysis plays an important role. The degree of cross-linking of the polymer vital for achievement of high ceramic yield is estimated with the use of thermal mechanical analysis (TMA). Decomposition of polymers and their conversion to ceramics is studied by the combination of differential thermal analysis (DTA), differential scanning calorimetry (DSC) thermogravimetry(TG), and mass spectrometry (MS). The use of these methods in study of the polymer-to-ceramic conversion is illustrated by case studies of a commercially available poly(allyl)carbosilane as the precursor of SiC, and a poly(hydridomethyl)silazane as the precursor of SiCN.

scholarly journals A thermal analysis study of dithizone and dithizonates of mercury, silver and bismuth

2000 ◽  
Vol 25 (0) ◽  
pp. 9-17 ◽  
Author(s):  
Marisa CHAHUD ◽  
Marco Aurélio da Silva CARVALHO FILHO ◽  
Nedja Suely FERNANDES ◽  
Massao IONASHIRO
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Analysis Study ◽  
X Ray ◽  
Thermal Analysis Study ◽  
Derivative Thermogravimetry

Solid dithizonates of Hg(I), Ag(I) and Bi(III) have been prepared. Thermogravimetry (TG), derivative thermogravimetry (DTG), differential scanning calorimetry (DSC), X ray diffraction powder patterns and elemental analysis have been used to characterize and to study the thermal stability and thermal decomposition of the dithizone and of these dithizonates.

scholarly journals Combined thermal analysis of plant oils

2021 ◽  
Author(s):  
Kinga Tamási ◽  
Kálmán Marossy
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Low Temperature ◽  
Glassy State ◽  
Mechanical Analysis ◽  
Plant Oils ◽  
Scanning Calorimetry ◽  
Natural Plant ◽  
The Moment ◽  
Current Reversal

AbstractThe paper deals with the study of seven selected natural plant oils. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermally stimulated discharge (TSD) methods were used. It has been found that most of the oils tested are in a glassy state at low temperature and have multiple transitions in the low temperature range. DSC shows complex melting-like processes or glass transition. For both DMA and TSD, the scaffold supportive method was used and found as a suitable one. DMA and TSD proved more sensitive than DSC and revealed at least two transitions between − 120 and − 40 °C. In the case of three oils (argan, avocado and sunflower), current reversal was observed by TSD; this symptom cannot be fully explained at the moment.

Thermal analysis study of the adsorption of D2O by sepiolite and palygorskite

1988 ◽  
Vol 135 ◽  
pp. 291-297 ◽  
Author(s):  
U. Shuali ◽  
S. Yariv ◽  
M. Steinberg ◽  
M.Muller Vonmoos ◽  
G. Kahr ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Analysis Study ◽  
Thermal Analysis Study

The decomposition of electrochemically loaded palladium hydride: a thermal analysis study.

1997 ◽  
Vol 253-254 ◽  
pp. 207-209 ◽  
Author(s):  
L.E.A Berlouis ◽  
P.J Hall ◽  
A.J MacKinnon ◽  
A.W Wark ◽  
D Manuelli ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Palladium Hydride ◽  
Analysis Study ◽  
Thermal Analysis Study

A comparative study on the effect of higher acrylate on cross-linkable PMMA used as environment friendly latexes

2020 ◽  
Vol 32 (2) ◽  
pp. 135-141
Author(s):  
Sweta Shukla
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Butyl Methacrylate ◽  
Cross Linking ◽  
Scanning Calorimetry ◽  
Environment Friendly ◽  
Glycol Diacrylate ◽  
Poly Propylene ◽  
Kinetics Of ◽  
Scanning Electron

The kinetics of emulsion polymerization of monomers methyl methacrylate (MMA)/ n-butyl methacrylate (BMA) was studied to investigate the effect of cross-linkable monomer poly(propylene glycol diacrylate) (PPGDA). The results showed that by the incorporation of PPGDA rate constant of reaction decreased. Fourier transform infrared spectroscopy and scanning electron microscope were used to characterize the synthesized polymers. The thermal analysis of samples was done by differential scanning calorimetry, and the results were compared by the previous studies with MMA/ n-butyl acrylate (BA) and MMA/2-ethylhexyl acrylate (EHA). The glass transition temperature ( T g) values show that the latexes prepared using BA and EHA as comonomer was suitable for binder purpose, but in the present study the T g is not suitable in case of BMA as higher acrylate comonomer. That may be due to more cross-linking in MMA-BMA-PPGDA. The results conclude that the BA and EHA can be used as the binder, but the use of BMA is limited for the binder in coating applications.

Channel inclusion of primary alcohols in isostructural solvates of the antiretroviral nevirapine: an X-ray and thermal analysis study

2010 ◽  
Vol 21 (4) ◽  
pp. 771-777 ◽  
Author(s):  
Nicole Stieger ◽  
Wilna Liebenberg ◽  
Johanna C. Wessels ◽  
Halima Samsodien ◽  
Mino R. Caira
Keyword(s):  
Thermal Analysis ◽  
Primary Alcohols ◽  
Analysis Study ◽  
X Ray ◽  
Thermal Analysis Study
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