Florosilikon Kauçuğunun Kür Koşullarının Optimizasyonu

Abstract

The main purpose of this thesis is to investigate the effects of peroxide type, peroxide amount and Type II co-agent TAIC on the curing and mechanical properties of fluoro vinyl methyl silicone (FVMQ).For this purpose, a number of mixtures have been prepared. While the type of peroxide and the amount of peroxide were changed in the first batch of mixtures prepared, Type II TAIC was added to the second batch of mixtures as a fixed amount of co-agent. Silicone elastomer mixtures were prepared in a torque rheometer at 25oC at 50 rpm in 20 minutes. The rheological and mechanical properties of the mixtures prepared in the presence and absence of TAIC were investigated. The prepared mixtures were cured in a moving mold rheometer at 160oC, 170oC and 180oC, and their rheological properties were examined. In order to determine the mechanical properties, samples in the form of plates and disks were prepared in a temperature-controlled press. Changes in mechanical properties such as tensile strength, elongation at break, hardness and rebound were investigated in the presence of peroxide types and co-agent using a universal tester, hardness tester and rebound device. In order to examine the energy absorption capacity of the prepared elastomers, a cyclic compression test with 50% compression with 10 repetitions was applied with a universal test device. When the results of all these studies were evaluated, it was seen that the type of peroxide added to the mixtures, the amount of peroxide and the co-agent had an important role on the rheological and mechanical properties of silicone elastomers. It was concluded that elastomers with an elongation of 200-372% and tensile strength in the range of 5.0-9.4 MPa can be prepared in a controlled manner, depending on the type of peroxide, amount of peroxide and type of co-agent. At the end of this study, the amount of peroxide and the type of peroxide and the use of co-agents and the preparation conditions of fluorosilicone elastomers with a wide working range were determined.