Abstract
The recycling of waste polyurethane (PU) using radiation-induced grafting was investigated. The grafting of waste PU onto a high-density polyethylene (HDPE) matrix was carried out using a radiation technique with maleic anhydride (MAH). HDPE pellets and PU powders were immersed in a MAH-acetone solution. Finally, the prepared mixtures were irradiated with an electron beam accelerator. The grafted composites were characterized by Fourier transformed infrared spectroscopy (FT-IR), surface morphology, and mechanical properties. To make a good composite, the improvement in compatibility between HDPE and PU is an important factor. Radiation-induced grafting increased interfacial adhesion between the PU domain and the HDPE matrix. When the absorbed dose was 75 kGy, the surface morphology of the irradiated PU/HDPE composite was nearly a smooth and single phase, and the elongation at break increased by approximately three times compared with that of non-irradiated PU/HDPE composite.
Highlights
Polyurethane (PU) has been used in a variety of applications due to its good mechanical, thermal, and chemical properties
The use of PU has led to the environmental issues because the greater part of the industrial waste PU are being disposed in landfill sites
We explored the utilization of waste as polymer filler via of PU is very important
Summary
Polyurethane (PU) has been used in a variety of applications due to its good mechanical, thermal, and chemical properties. Waste PU can be recycled and used as filler for commodity polymers to improve thermal and mechanical properties [5]. A high compatibility between the commodity polymers and waste PU is an important factor to consider in the formation of a good composite. Graft polymerization is an excellent way to improve the miscibility between PU and commodity polymers [7]. Radiation-induced grafting can be proceeded between monomer and polymer during the irradiation. Maleic anhydride (MAH) has become an attractive monomer to improve the hydrophilicity of polyolefin [11]. Polymers grafted with maleic anhydride (MAH) have been used as compatibilizers to improve the interfacial interaction between immiscible polymers [6,12]
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