Physical and mechanical properties of polyamide 6/polystyrene (PA6/PS) reinforced by PbO₂ composites for X-ray shielding

Abstract

Thermal, electrical, as well as mechanical behavior of blends of polyamide 6/polystyrene (PA6/PS) (50/50 wt/wt%) loaded with different concentrations of lead dioxide (PbO2) were investigated for X-ray shielding. Thermal stability and hardness (shore D) of these composites are studied. Addition of PbO2 decreases the thermal stability of the prepared composites. Stability of thermal properties confirmed by determining the activation energy for the thermal decomposition of unfilled PA6/PS and filled composites according to the Horowitz and Metzger method. Dielectric properties of bulk PbO2 have been investigated as a function of frequency and temperature in the frequency range from 40 Hz to 5 × 106 Hz and in the temperature range from 293 K to 423 K. The characterization of the prepared composites is done using scanning electron microscope. With PbO2-loaded PA6/PS blends composites, the dielectric properties were significantly influenced by γ-irradiation effects that ε′ and [Formula: see text] values increase with radiation dose up to 100 kGy for samples loaded with PbO2. Linear attenuation coefficient μ and half-value layer (HVL) of all composites strongly depend on the concentration of the filler used and the applied voltage of X-ray machine. HVL of the obtained composites that loaded with 100 wt/wt% of PbO2 nearly 3 mm can be used as X-ray tube housing, equipment housings and castings, electronic devices protection, and so on.

Effect of pre-axial tensile tension, temperature, and hysteresis loss of natural rubber doped MWCNTs on the electrical properties for sensors applications

“…It was observed that the additions of conductive materials to these polymers not only increases the electrical conductivity but also improves its mechanical properties. [7][8][9][10][11][12] Rubber is comprehensively utilized in various fields of modern and cultural applications because of its excellent elasticity and reversible deformability, just as water and heat resistance properties. On the off chance that NR is proposed to satisfy market consumptions, its undesired actual properties should be improved.…”

“…It was observed that the additions of conductive materials to these polymers not only increases the electrical conductivity but also improves its mechanical properties. 7-12…”

Effect of PbO incorporation with different particle size on X-ray attenuation of polystyrene

“…The X-ray spec tra are a com bi na tion of nar row peaks on a con tin u ous spec trum, formed as a re sult of char ac ter is tics and brems strah lung ra di a tion. The major ity of di ag nos tic X-ray en er gies are in the range of 25 keV to around 200 keV [1]. The en ergy spec trum of the X-ray beam is crit i cal in both di ag nos tics and ther a peutics for the cor rec tion of beam hard en ing ar ti facts, the pre dic tion of im age qual ity, and the eval u a tion of de tector per for mance [2].…”

The Preparation of Monomer Casting Polyamide 6/Thermotropic Liquid Crystalline Polymer Composite Materials with Satisfactory Miscibility

“…Polyamide 6 (PA6) is well known as high performance engineering plastic with high strength, good fatigue resistance, and satisfactory wearing durability [ 1 , 2 , 3 , 4 ]. However, its poor notched impact toughness (especially at low temperatures) restricts its overall performance, which limits its applications in modern plastic industries and newly emerging fields [ 5 , 6 , 7 , 8 , 9 ], e.g., wearable fabrics [ 4 ], self-supporting water purification films [ 9 ], and nanofiltration membrane [ 7 ], etc.…”