Uluslararası İleri Doğa Bilimleri ve Mühendislik Araştırmaları Dergisi Sayı 7, S. 20-24, 4, 2023 © Telif hakkı IJANSER’e aittir Araştırma Makalesi https://as-proceeding.com/index.php/ijanser ISSN: 2980-0811 International Journal of Advanced Natural Sciences and Engineering Researches Volume 7, pp. 20-24, 4, 2023 Copyright © 2023 IJANSER Research Article 20 Use of Inorganic Wastes as Fillers in Production of Polyester Composites and Evaluation of Properties of Obtained Composite Mukaddes Karataş 1 and Ercan Aydoğmuş 1* 1 Department of Chemical Engineering, Engineering Faculty, Fırat University, 23119, Elazığ, Türkiye * Email of corresponding author: ercanaydogmus@firat.edu.tr (Received: 10 April 2023, Accepted: 22 April 2023) (DOI: 10.59287/ijanser.2023.7.4.538) (1st International Conference on Scientific and Innovative Studies ICSIS 2023, April 18-20, 2023) ATIF/REFERENCE: Karataş, M., & Aydoğmuş, E. (2023). Use of Inorganic Wastes as Fillers in Production of Polyester Composites and Evaluation of Properties of Obtained Composite. International Journal of Advanced Natural Sciences and Engineering Researches, 7(4), 20-24. Abstract – The use of industrial factory wastes as a filler in polymer composite materials is becoming more and more common. In this way, these wastes that cause environmental pollution are eliminated and new composite materials are developed. Polymer composites with low cost and high thermal stability are preferred in many sectors. In this research, some physical and chemical properties of inorganic waste reinforced polyester composites have been evaluated. The use of industrial inorganic wastes as fillers in polyester composites develops some thermophysical properties of composites. In particular, such industrial wastes are dried before being used in the composite, the particle size is reduced, and it is ensured to have a homogeneous structure. This type of waste, which is used as filler, is used in the polyester composite in optimum proportions. The use of high inorganic fillers in polyester both weakens the mechanical strength of the composites and negatively affects the matrix structure. Besides, inorganic waste reinforcement raises the surface hardness of polyester composites. Such fillers are improved both the thermal stability and non- flammability of the polyester composite. High-density inorganic fillers are used to obtain a high-density and economical polyester composite. Low-density inorganic industrial wastes also reduce the density of composites. However, the reinforcement of inorganic fillers into polyester at a high rate adversely affects both the surface morphology and the workability of the produced composites. Keywords – Inorganic Wastes, Polyester Composite, Thermal Conductivity, Mechanical Properties, Thermal Stability I. INTRODUCTION The continuous production and consumption of petroleum-based composites and the inability to control waste cause irreversible damage to the environment. The greenhouse gas released in the time between the production of a product and its conversion to waste indirectly increases its carbon footprint. To reduce the carbon footprint, it is important to control the indirect causes of the consumed product such as materials, logistics, and production processes. Minimizing waste generation by producing high-performance, durable and long- lasting, environmentally friendly, sustainable materials will provide low carbon and circular economy [1]. Composites have a wide range of applications such as the aerospace, automotive, sports, medical, electrical, and construction industries [2-5]. Generally, a composite material consists of a matrix (metal, ceramic, or polymer) that holds the reinforcement to form the desired shape, and reinforcement (fibers, particles, whisker, and/or