Research Information System
Thesis Type: Doctorate
Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2022
Thesis Language: Turkish
Student: NİHAYET KOÇYİĞİT
Supervisor: Necati Yalçın
Open Archive Collection: AVESIS Open Access Collection
Abstract:
Every year in the world and in our country, many lives and property are lost in fires in residences and workplaces for various reasons. In recent years, the risk of loss of life and property in case of fire is quite high due to the increase in the number of high-rise buildings with urban transformation in our country and the lack of necessary precautions against fire. In order to minimize these risks and to cause less damage to people, goods and historical artifacts, the flame retardant property of expandable polystyrene (EPS), which is used as an insulation material, has been tried to be developed. For this reason, it was tried to stop the fire completely or to extend the fire start time by adding flame retardant chemicals to the EPS during the production phase, but 100% success was not achieved. In this study, besides the flame retardant properties, the flame retardant properties of EPS nanocomposite foams produced with the addition of clay, calcite, graphite and perlite inorganic nanoparticles were tried to be brought to a higher level. Studies on this subject consist of two parts. In the first section, a batch reactor was designed and manufactured for EPS production, and in the second section, EPS nanocomposite beads reinforced with 1%, 3%, 5% inorganic nanoparticles were produced by suspension polymerization. EPS beads are formed in blocks by a series of processes such as pre-blowing, aging, moulding, regrinding and cutting. Thermal analysis, flammability tests, tensile and bending mechanical tests were applied to the samples taken from the blocks according to certain standards. According to the analysis results, it was observed that inorganic nanoparticle reinforcement improved the flammability properties of EPS nanocomposite foam, while decreasing its mechanical properties, it increased the thermal stability of the samples.
| Key Words : EPS, Suspension polymerization, Flame retardant, Graphite,Perlite, Calcite, Clay, Batch reactor |