Abstract
We have summarized Al, Fe, C and P atoms incorporations within cross-linking interaction and location of those after MDF procedure of sulphobelitic clinker — hydroxypropylmethyl cellulose (hpmc) — sodium salt of polyphosphates (poly-P) compositions. Design of Al/Fe-O-C/P cross links is given and discussed. Thermoanalytical patterns (i) give the evidence of the presence of polymers in the reaction products and (ii) confirm the linkages of solidified polymers throughX=C or P of Al/Fe-O-X cross links in interphase regions with decomposition temperature interval higher than this in classical hydraulic materials. Designed local structure of interphase regions gives atomic level explanation of the densification of a bulk, its microstructure and exceptional technological properties. Similar phenomenon has been reported for the high aluminium — polyvinylalcohol/acetate MDF compositions. Moreover, variant clinker as well as polymers employed in syntheses represent one of the proposals aimed to the increase of the moisture resistence; our results are in the power of the above alternative for phases of sulphobelitic clinker.
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Abbreviations
- C:
-
CaO
- A :
-
Al2O3
- F :
-
Fe2O3
- S :
-
SO3
- H :
-
H2O
- w/s :
-
water:solidums mass ratio
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This study was funded under Project 85/92 granted by the Slovak Grant Agency for Science and represents the output of joint research agreed by the Institute of Inorganic Chemistry SAS (Bratislava, Slovak Republic) and the Chemistry Department of University Exeter (Exeter, U.K.). We thank Chemische Fabrik R.A. Oetker (Budenheim, F.R.G.) for provision of sodium polyphosphate glass samples. This study also forms part of EC contracted Copernicus Project (ERB CIPA-CT 94-0105).
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Drábik, M., Gáliková, L., Sadleková, Z. et al. Cross-linking of atoms and thermal stability of new MDF compositions. Journal of Thermal Analysis 46, 479–487 (1996). https://doi.org/10.1007/BF02135025
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DOI: https://doi.org/10.1007/BF02135025