Thermal and flammable stability of radiated LDPE and composites
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RESEARCH ARTICLE
Thermal and flammable stability of radiated LDPE and composites Maziyar Sabet1 · Hassan Soleimani2 · Seyednooroldin Hosseini3 Received: 1 February 2019 / Accepted: 2 December 2019 © Central Institute of Plastics Engineering & Technology 2019
Abstract The thermal decomposition and flame-retardant physical characteristics of specimens are explained via the limiting oxygen index (LOI), cone calorimeter, smoke density, and thermogravimetry analysis (TGA) tests. The outcomes of TGA, smoke emission, and LOI tests showed that thermal strength and flame-retardant characteristics of the specimens containing magnesium hydroxide (MH) have superior thermal strength compared with the similar specimens containing alumina trihydrate (ATH). The flame-retardant characteristics and thermal strength of specimens were boosted upon radiation and the development of cross-linking bonds in the polymer structure. The smoke density tester results present that MH specimens generate the least smoke density associated with the pristine low-density polyethylene and the similar ATH specimens. This study proved that the inclusion of MH and radiation of specimens generated greater thermal strength and flame-retardant characteristics compared with the inclusion of ATH to radiated specimens. These successes are right and proper for cable companies to deliver halogen-free flame-retardant cable materials. Keywords Ignition · Low-density polyethylene · Cable
Introduction LDPE has the main yearly manufacture in contemporary years. The purposes for the severe demands of LDPE are the reasonable price, individual physical and mechanical characteristics [1–3]. Therefore, the reasonable price of LDPE, accompanied by its wonderful mechanical characteristics, makes it a valuable preference for several consumptions, for instance, kinds of cable insulations [4–6]. Ethylene vinyl acetate (EVA) is utilized generally in cable manufacturing to fabricate heat contractable insulation, semi-conductive insulation jackets, and anti-flammable insulation [7]. The wire industries utilize EVA owing to accept extreme filler loadings to avoid embrittlement [8–10]. Along with * Maziyar Sabet [email protected] 1
Petroleum and Chemical Engineering, Universiti Teknologi Brunei, Jalan Tungku Link, Gadong BE1410, Brunei Darussalam
2
Faculty of Science and Information Technology, Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Ipoh, Perak, Malaysia
3
Department of Engineering, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran
contemporary standards, the wire producers should manufacture cables with slight smoke productions, small production of acidic/poisonous gases, and short fire-spread characteristics. MH and ATH are extensively consumed as fillers in polyolefins to convey naturally responsive cables [11]. Consequently, the query for halogen-free cables and particularly the cross-linked or thermoplastic elastomers is turning out to be further common [12–14]. But, a h
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