Investigation of the effect of phosphoric acid addition as flame retardant in novoloac resin production
Project no. 21756 · Status: Kapanmış (Yayın bekleniyor) · 2020
Summary
<p>Phenolic novolac resins are synthesis as a result of the condensation reaction in an acidic medium with the help of acid catalysts. The mole ratio of formaldehyde/phenol should be less than one. In this thesis, it was investigated increasing the flame retardant properties of novolac resins with phosphate additives.</p><p>There were three types of processes in this studies. This first two experimental studies were the synthesis of novolac resin with acid catalysts. Oxalic acid and instead of the oxalic acid catalyst, oxalic and phosphoric acid were changed the catalyst type and ratio without changing the mole ratio of the catalyst. Firstly, the acidic medium was formed as a result of the condensation reaction</p><p>was neutralized by adjusting the pH with bases. The second study was continued without pH adjustment. Third study, it was investigated how the fire retardant property was affected by physically mixing phosphoric additives and commonly used fire retardant agents with novolac resin. In all three studies sections, it was determined that the use of phosphoric acid together with</p><p>oxalic acid gave better results as a fire retardant than just oxalic acid used. All results were compared and optimum reaction conditions were determined. During these studies, X-Ray Fluorescence Spectrometer (XRF), the thermal gravimetric (TG) analysis was carried out using Perkin Elmer STA 8000, melting point analysis accordance with ISO 3146 and flow distance analysis in accordance with ISO 8619 were used.</p><p>This project was supported by the Ege University Scientific Research Project (BAP) under the project number of FYL-2020-21756</p><p><br></p><p>Key Words: Novolac resin, flame retardant, phosphoric acid, pH arrangement</p>