| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wiecińska, Paulina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Glass–Zirconia Composites as Seals for Solid Oxide Cells: Preparation, Properties, and Stability over Repeated Thermal Cyclescitations
- 2020Sweet ceramics: how saccharide-based compounds have changed colloidal processing of ceramic materialscitations
- 2019Application of highly sensitive spectrophotometric analysis in detection of metal content in molybdenum reinforced alumina obtained by precursor infiltration of ceramic preformscitations
- 2018Thermally induced structural transformations of linear coordination polymers based on aluminum tris(diorganophosphates)citations
- 2018Dense alumina ceramics obtained by gelcasting and cold isostatic pressing with the use of 2-carboxyethyl acrylatecitations
- 2018Surface modification of alumina powder to prevent exfoliation of samples fabricated by gelcasting
- 2018Combined centrifugal-slip casting method used for preparation the Al2O3-Ni functionally graded compositescitations
- 2018Thermoanalytical studies of the ceramic-metal composites obtained by gel-centrifugal castingcitations
- 2018Diacryloyl derivative of mannitol - synthesis and application in gelcasting of Al2O3-ZrO2 compositescitations
- 2017Colloidal processing of Al2O3 and BST materials - investigations of thermal stability and decomposition of green bodiescitations
- 2017Al2O3/Ni functionally graded materials (FGM) obtained by centrifugal-slip casting methodcitations
- 2016Processing of porous ceramics from highly concentrated suspensions by foaming, in situ polymerization and burnout of polylactide fiberscitations
- 20162-carboxyethyl acrylate as a new monomer preventing negative effect of oxygen inhibition in gelcasting of aluminacitations
- 2016Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systemscitations
- 2016Thermal degradation of organic additives used in colloidal shaping of ceramics investigated by the coupled DTA/TG/MS analysiscitations
- 2016Impulse excitation technique IET as a non-destructive method for determining changes during gelcasting processcitations
- 2015Organic additives in gel-tape casting of ceramic powders - novel approach to the problem of elasticity and cracking of thin tapescitations
- 2015Shaping of ceramic powders by techniques using in situ polymerization: advantages and challengescitations
- 2014Monoacryloyl esters of carbohydrates: Synthesis, polymerization and application in ceramic technologycitations
- 2014Acryloyl derivative of glycerol in fabrication of zirconia ceramics by polymerization in situcitations
- 2013Fabrication of textured [alpha]-alumina in high magnetic field via gelcasting with the use of glucose derivativecitations
- 2013New multifunctional compounds in gelcasting process - introduction to their synthesis and application
Places of action
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article
Thermally induced structural transformations of linear coordination polymers based on aluminum tris(diorganophosphates)
Abstract
The thermal transitions of inorganic–organic hybrid polymers composed of linear aluminum tris(diorganophosphate) chains with a general formula of catena-Al[O2P(OR)2]3 (where R = C1–C8 alkyl group or phenyl moiety) have been studied by means of DSC, powder XRD, TGA and TG-QMS, as well as optical spectroscopy. DSC and XRD reveal that most of them undergo reversible structural transformations in the solid state between −100 and 200 °C caused by the changes in conformation of their organic substituents; however, a translational displacement of the rigid polymeric chains occurs only in the case of the derivative bearing long 2-ethylhexyl groups, which becomes liquid at about 140 °C. The thermal decomposition of the studied polymers begins between 200 and 265 °C depending on the type of organic substituent R decorating their aluminophospate core. TGA combined with mass spectrometry of the evolved gaseous products shows that the pyrolytic decomposition of Al[O2P(OR)2]3 proceeds either through β-elimination of olefin (for compounds with C2–C8 aliphatic ligands), or a homolytic cleavage of the P–OR bond (for methyl and phenyl derivatives); both processes are accompanied by condensation of the newly formed POH groups and liberation of water. Powder XRD, FTIR and SEM analyses of the solid residues indicate that thermolysis of Al[O2P(OR)2]3 accompanied by olefin elimination leads to the formation of condensed aluminumphosphates, mainly aluminum cyclohexaphosphate, exhibiting porous morphology. On the other hand, thermal degradation of methyl or phenyl derivatives results in amorphous aluminophosphate residues, and the latter contains conducting carbonaceous phases.