Effect of gamma irradiation on thermal, mechanical and water absorption behavior of LLDPE hybrid composites reinforced w
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Effect of gamma irradiation on thermal, mechanical and water absorption behavior of LLDPE hybrid composites reinforced with date pit (Phoenix dactylifera) and glass fiber Kapil Gulati1,2 · Sohan Lal1 · Suresh Kumar1 · Sanjiv Arora1 Received: 22 March 2020 / Revised: 24 July 2020 / Accepted: 6 November 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Date pit/ glass fiber reinforced LLDPE hybrid composites were compounded by single screw extruder and injection molded into dumbbell specimens. The composites were subjected to thermal gravimetric analysis (TGA), tensile testing, flexural study and water absorption analysis. TGA study confirmed the positive hybrid effects of reinforcements on the thermal stability of LLDPE composites. The decrease in weight loss percentage with the addition of glass fiber authenticated the increase in thermal stability. The maximum tensile strength 20.2 ± 0.8 MPa was obtained with 10% date pit and 20% glass fiber. The water-resistant property of hybrid composites reinforced with high percentage of glass fiber was found to be improved in comparison with virgin. The resulting composites were also exposed to different gamma doses (75 and 150 kGy) and the effect is characterized in terms of thermal and mechanical properties. Irradiation of gamma rays under 75 kGy improved the thermal stability and tensile strength than unirradiated and irradiated samples at higher dose (150 kGy). Keywords Thermal · Tensile · Hybrid · Date pit · Glass fiber · Gamma irradiation
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s0028 9-020-03477-w) contains supplementary material, which is available to authorized users. * Sanjiv Arora [email protected] Kapil Gulati [email protected] Sohan Lal [email protected] Suresh Kumar [email protected] 1
Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
2
Department of Chemistry, Dyal Singh College, Karnal, Haryana 132001, India
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Polymer Bulletin
Introduction Through the last few years, there has been tremendous growth in the formulation of thermoplastic as well as thermosetting polymer composites using natural fibers as reinforcements [1]. In addition to their recyclability, thermoplastic polymer composites are preferred over the thermosetting-based composites as they easily undergo the process of extrusion and injection molding [2]. Thermoplastic polymers include the examples of PVA, polyethers, polypropylene (PP), low, linear low and high density polyethylenes (HDPE), etc. Among these linear low density polyethylene (LLDPE) being less dense, flexible, extra linear and possessing more tensile strength is an eminent commodity copolymer of ethylene and another longer ɑ-olefin such as butane, hexene and octene. Due to the absence of long chain branching, LLDPE possesses an ease of processability in fields of commodity, pipe industry, agricultural film, cable containers, covers, packaging, etc.[3]. On the other
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