Production of flame retardant polyester composites and fibers

Akan, Mithat
Poly(ethylene terephthalate) (PET) fiber is one of the leading synthetic fibers in textile industry. However, its flame retardant properties are poor to be used in certain applications, therefore flame retardant additives are generally used in order to improve flame retardant properties of PET. The main objective of this study is to find suitable flame retardant additives for PET that can synergize with each other and that can improve the flame retardant properties without compromising the mechanical properties of PET. PET fibers were prepared by using a twin screw micro-compounder at 260 ºC and 100 rpm for 3 minutes. Main flame retardant additive of the study is zinc phosphinate. Nano-zinc borate and huntite-hydromagnesite were used as synergists to increase the flame retardant and mechanical properties of PET. 10% zinc phosphinate and 2% and 4% synergists were mixed with PET and tested for mechanical and flame retardant properties. Test results show that zinc phosphinate-zinc borate system, while providing sufficient flame retardant properties, led to poor tensile strength. On the other hand, PET with zinc phosphinate and huntite-hydromagnesite has both sufficient flame retardant properties and better mechanical properties than PET with zinc phosphinate and zinc borate. As a result, zinc phoshinate-huntite-hydromagnesite system can be suggested to improve the flame retardant properties of PET.


Preparation of epoxy-based composites containing barium metaborate and their characterization
Yürekli, Elif; Bayram, Göknur; Department of Chemical Engineering (2014)
Epoxy resin is one of the most important thermosetting polymers, widely used in various fields of industry. However, like most of the polymeric materials, epoxy resins are flammable and this restricts their application areas. The purpose of this thesis is to increase flame retardant property of epoxy-based composites using various flame retardant additives mainly including barium metaborate. This thesis consists of three main parts. In the first part, preliminary composites, which containing barium metabora...
Improvement of mechanical and flame retardancy properties of biocomposites based on low density polyethylene and polylactic acid
Altun, Yasemin; Bayramlı, Erdal; Doğan, Mehmet Onur; Department of Polymer Science and Technology (2015)
The main objective of this study was to improve the mechanical and flame retardant properties of low density polyethylene (LDPE) and poly (lactic acid) (PLA) based biocomposites. Wood flour (WF) and jute fabric were used as the fillers. In the mechanical property improvement studies with LDPE, the effect of two compatibilizing agents MA (random terpolymer of ethylene, acrylic ester and maleic acid) and GMA (random terpolymer of ethylene, acrylic ester and glycidyl metacrylate) functionalized polymers at dif...
Fabrication and characterization of silk sericin based composite films for biomedical applications
Haliloğlu, Alper; Ercan, Batur; Department of Metallurgical and Materials Engineering (2023-1-18)
Silk Sericin (SS) is one of the two major proteins in silk fiber and it is discarded as a waste in the silk industry. Recently, sericin captured attention in the biomedical field due to its variable amino acid composition and diverse functional groups. The physical and chemical properties of silk sericin can be adjusted via incorporation of different secondary phase additives for biomedical applications. However, brittle nature, low mechanical properties, and inability to avoid bacterial growth by itself li...
Various durability aspects of slurry infiltrated fiber concrete
Gilani, Adel Mohamed; Tokyay, Mustafa; Department of Civil Engineering (2007)
Slurry infiltrated fiber concrete (SIFCON) was first produced in 1979 in the USA, by incorporating large amounts of steel fiber in molds to form very dense network of fibers. The network is then infiltrated by a fine liquid cement-based slurry or mortar. The steel fiber content can be as high as 30 % by volume. This percentage usually does not exceed 2 % in normal fiber reinforced concrete (FRC) for reasons related to mixing and workability. Due to its high fiber content, SIFCON demonstrates unique and supe...
Ultrasonication for Environmentally Friendly Preparation of Antimicrobial and Catalytically Active Nanocomposites of Cellulosic Textiles
Kwiczak-Yigitbasi, Joanna; Demir, Mine; Ahan, Recep Erdem; Canlı, Sedat; ŞEKER, URARTU ÖZGÜR ŞAFAK; BAYTEKİN, BİLGE (2020-12-01)
The global demand for sustainable and functional fibers and textile materials is increasing with the pressure to limit the synthetic petroleum-based counterparts. In this study, we use ultrasonication for the preparation of eco-friendly cellulose fabrics bearing silver or gold nanoparticles (NPs). The mechanochemistry of cellulose is based on the breakage of glycosidic bonds and the formation of mechanoradicals. These mechanoradicals can reduce Au3+ and Ag+ ions in solution, and the reduced metals can be st...
Citation Formats
M. Akan, “Production of flame retardant polyester composites and fibers,” M.S. - Master of Science, Middle East Technical University, 2013.