Abstract
Polyurethane (PU) is a very popular polymer that is used in a variety of applications due to its good mechanical, thermal, and chemical properties. However, PU recycling has received significant attention due to environmental issues. In this study, we developed a recycling method for waste PU that utilizes the radiation grafting technique. Grafting of waste PU was carried out using a radiation technique with polyethylene-graft-maleic anhydride (PE-g-MA). The PE-g-MA-grafted PU/high density polyethylene (HDPE) composite was prepared by melt-blending at various concentrations (0–10 phr) of PE-g-MA-grafted PU. The composites were characterized using fourier transform infrared spectroscopy (FT-IR), and their surface morphology and thermal/mechanical properties are reported. For 1 phr PU, the PU could be easily introduced to the HDPE during the melt processing in the blender after the radiation-induced grafting of PU with PE-g-MA. PE-g-MA was easily reacted with PU according to the increasing radiation dose and was located at the interface between the PU and the HDPE during the melt processing in the blender, which improved the interfacial interactions and the mechanical properties of the resultant composites. However, the elongation at break for a PU content >2 phr was drastically decreased.
Highlights
Polyurethane (PU) is a very popular polymer that is used in a variety of applications, such as in vehicles, furniture, and construction materials, due to its good mechanical, thermal, and chemical properties [1,2]
Mechanical recycling is performed by regrinding polyurethane foam into powder, allowing the modified materials to be reused as a filler [3]
The effect of the radiation grafting on PU/high density polyethylene (HDPE) composites for developing a composite with better properties was studied
Summary
Polyurethane (PU) is a very popular polymer that is used in a variety of applications, such as in vehicles, furniture, and construction materials, due to its good mechanical, thermal, and chemical properties [1,2]. PU can be recycled by several methods, such as mechanical recycling, advanced chemical and thermo chemical recycling, energy recovery and product recycling [3] Among these methods, mechanical recycling is performed by regrinding polyurethane foam into powder, allowing the modified materials to be reused as a filler [3]. Mechanical recycling is performed by regrinding polyurethane foam into powder, allowing the modified materials to be reused as a filler [3] Nano fillers, such as nanoclay, nanosilica, carbon nanotubes and grapheme, have been used as commercial fillers for the polymer composite [5]. We developed a recycling method for waste PU that utilizes the radiation grafting technique. The mechanical properties of the composite were determined
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