Comparative Investigation of Thermal, Mechanical, and Chemical Properties of Low-Density and High-Density Polyethylene

This study presents a comparative analysis of the thermal, mechanical, and chemical properties of Low-Density Polyethylene (LDPE) and High-Density Polyethylene (HDPE). Polyethylene, being one of the most widely used polymers, plays a crucial role in various industries. This research aims to understand the performance differences between LDPE and HDPE, using Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), tensile testing, and Fourier Transform Infrared (FTIR) and Raman Spectroscopy. The findings reveal that HDPE exhibits superior mechanical strength and thermal stability, whereas LDPE demonstrates greater flexibility and chemical resistance. These results provide insights into selecting suitable materials for specific applications in packaging, construction, and consumer products.