VARIATIONS IN RESIDUAL DOUBLE BONDS OF A COMMERCIAL SELF ETCHING ADHESIVE
Abstract:
The FTIR examination technique allows the identification of the degree of conversion from monomer to polymer of the adhesive systems by determining the infrared absorption spectrum of the studied products. As the current tendency moves towards work simplification, we considered it necessary to make a study on a self etching adhesive. Samples of self etching adhesive Adper Prompt L-Pop (3M ESPE) were prepared, with 5 mm diameter and 1 mm width, polymerized with an Elipar 2500 (3M ESPE) halogen curing light, 600mW/cm2, and an Elipar Freelight 2 (3M ESPE) LED light, 1000mW/cm2. The samples were examined through the FTIR technique immediately after polymerization, then three months later, after preparing the samples. The results indicate a slightly higher value of the residual double bonds during the LED polymerization than during the halogen one. If the examination of the samples is done later, one can observe a decrease of the double residual bonds compared to the initial values.
Conclusion: In this experiment, the value of the double residual bonds of the Adper Prompt L-Pop adhesive has been less influenced by the light curing source used, than by the time the tests have been performed.
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