Current Issue

In this study, blend films were prepared using the calendering process, with polyethylene (PE), polypropylene (PP), and poly(methyl methacrylate) (PMMA) melt-mixed with poly(vinyl chloride) (PVC) at various ratios. The process conditions, structural, thermal, morphological, and mechanical properties were analyzed using Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, and mechanical testing. Results indicated that PVC/PE and PVC/PP blends were immiscible, while PVC/PMMA blends were miscible. The miscibility directly enhanced the mechanical properties, with yield stress and elastic modulus of PVC/PMMA (95/5 wt%) blends improving by 29.7% and 28.8%, respectively. Calendering conditions, such as banking time and current values, improved by 2-32% for all PVC blends. The increased miscibility significantly reduced energy consumption and production time, offering a cost-effective method for calendering PVC films.

Hide Abstract

This study delves into the development and characterization of MoS₂ nanoparticles, employing a hydrothermal approach. The synthesized MoS₂ nanoparticles underwent comprehensive analysis utilizing various analytical techniques such as X-ray Diffraction (XRD), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray spectroscopy (EDX), UV-Visible spectroscopy, and BET surface analysis. XRD analysis revealed the presence of a hexagonal phase structure with a crystallite size of 13 nm, indicating the nanoscale nature of the synthesized material. RAMAN spectroscopy confirmed the presence of characteristic peaks corresponding to Mo and S, validating the composition of the composites. FESEM images shows that the formation of flake like morphology and EDX affirmed the presence of Mo and S elements with the absence of other impurities, ensuring the purity of the MoS₂ nanoparticles. UV-visible spectroscopy exhibited an energy band gap of 2.37 eV, suggesting potential applications in optoelectronic devices. BET surface area analysis revealed a surface area of 80 m²/g, indicative of the high surface area of the composites, which may enhance their reactivity and performance in various applications. These findings contribute to the understanding of MoS₂ nanoparticles and their potential utilization in fields such as solar cell, catalysis, sensing, and energy storage.

Hide Abstract

This study evaluates the relationship with microstructural and electromagnetic properties dependences on sintering temperature of bulk Copper ferrites synthesized by the solid state reaction method calcined at T_s 950^°C, 1050^°C, 1100^°C and 1150^°C. These properties are examined by XRD, DTA and TGA, SEM, B–H Loops Tracer, VSM and Electrometer. The affirmation of single-phase cubic spinel structured has been observed by XRD pattern for all T_s. Under the influence of heat treatment, the grain sizes escalate from 3.63 μm to 6.48 μm due to the movement of grain boundaries. Softer ferromagnetic nature of sample for all T_s has been signed by narrow hysteresis loops. The assessment of magnetic properties manifests that the saturation magnetization as well as permeability amplifies with T_s which is correlated to the increase of the grain size. Frequency dependence dielectric constant (ε′) shows the usual dielectric nature of ferromagnetic materials. The results of all these measurements clearly emphasize the effect of sintering temperature to bring a significant change in above mention properties which is a prerequisite to the materials applications.

Hide Abstract