Caracterização térmica e espectroscópica de monômeros e fotoiniciadores curados por fotopolimerização.

Abstract

In the search for innovative materials with excellent properties such as low specific weight and resistance to impact, companies are increasingly investing in research of these materials and the improvement of industrial processes leading to the production of them. Back to environmental degradation and reduce the time of production are the key objectives of this project, which is specifically to replace the process of thermal curing (termopolimerização) by UV radiation curing (photopolymerization) of mixtures of monomers and fotoiniciadores used in the production of ophthalmic lenses. The monomers and fotoiniciadores used were from industries as SARTOMER, CIBA, Ipiranga and Chemtura, acquired through BRAZMO Bandeirante. We used various techniques for characterization of raw materials such as thermogravimetry / differential thermal analysis (TG / DTG), differential scanning calorimetry (DSC), vibrational spectroscopy for absorption in the infrared (IR) and electronic absorption spectrophotometry in the UV-Visible (UV-Vis). The studies of characterization of monomers, oligomers and the fotoiniciadores indicated that all samples showed low thermal stability.