Author(s): Alarcon, Rafael Turra [UNESP] ; Cunha Holanda, Bruno Barreto da [UNESP] ; Rinaldo, Daniel [UNESP] ; Caires, Flavio Junior [UNESP] ; Almeida, Marcos Vinicius de ; Bannach, Gilbert [UNESP]
Date: 2018
Persistent ID: http://hdl.handle.net/11449/165633
Origin: Oasisbr
Subject(s): thermal studies; photopolymerization; non-toxic coinitiator; conversion degree; tertiary amine
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
POSMAT/UNESP
PIBIC
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
The aim of this paper is to replace toxic coinitiators (tertiary amines) by non-toxic compounds such as glycerol and inositol (polyalcohol) in dimethacrylate resins. For this purpose, mid infrared spectroscopy (MIR) was used to calculate the monomers' degree of conversion (%DC); as well as simultaneous Thermogravimetric Analysis - Differential Thermal Analysis (TGA-DTA) and Differential Scanning Calorimetry (DSC) were conducted to evaluate thermal stability, degradation steps, and thermal events. The use of different initiator systems did not modify the thermal events or the thermal stability of each of the dimethacrylate resins. Results show a substitution of system 2 (toxicity) by system 3 (low toxicity), which had a good conversion velocity and total conversion in some monomers, is plausible.
Univ Estadual Paulista, Fac Ciencias, Dept Quim, BR-17033260 Sao Paulo, SP, Brazil
Univ Municipal Sao Caetano do Sul, BR-09521160 Sao Caetano do Sul, SP, Brazil
Univ Estadual Paulista, Fac Ciencias, Dept Quim, BR-17033260 Sao Paulo, SP, Brazil
CAPES: 024/2012
PIBIC: 29451
FAPESP: 2012/21450-1
FAPESP: 2013/09022-7
