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Thermoanalytical characterisation of new dental ionomer biocomposites

T. RADU1,* , S. SIMON1,2, C. PREJMEREAN3, V. SIMON1,2, A. COLCERIU3, C. TAMAS3, L. SILAGHI-DUMITRESCU3

Affiliation

  1. Institute for Interdisciplinary Experimental Research of Babes-Bolyai University, 400271 Cluj-Napoca, Romania
  2. Babes-Bolyai University, Faculty of Physics, 400084 Cluj-Napoca, Romania
  3. Raluca Ripan Institute of Chemistry, 400294 Cluj-Napoca, Romania

Abstract

Thermoanalytic properties of four new glass ionomer cements were investigated using thermal techniques such as thermogravimetry (TG) and differential thermal analysis (DTA). The materials contain in the same ratio different copolymers and a mixture of two glass powders with preponderance of a fluoroaluminosilicate type glass. The X-ray diffraction analysis shows that these materials are all in the vitreous state. The thermal analysis traces have similar characteristics and indicate water removal, decomposition of hydroxyl groups, thermal decomposition process of the polymeric network and a dissociation process without mass loss. The last process is more likely to point out the glass transition taking place in the inorganic glass phase..

Keywords

Thermal analysis, Biocomposites, Glass ionomer cements.

Submitted at: Nov. 13, 2007
Accepted at: April 4, 2008

Citation

T. RADU, S. SIMON, C. PREJMEREAN, V. SIMON, A. COLCERIU, C. TAMAS, L. SILAGHI-DUMITRESCU, Thermoanalytical characterisation of new dental ionomer biocomposites, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 958-960 (2008)