Effect of silane treated fly ash on physico‐mechanical, morphological, and thermal properties of recycled poly(vinyl chloride) composites

Abstract

The silane treatment on properties of fly ash (FA) and development of its composite using recycled poly(vinyl chloride) (r‐PVC) material retrieve from waste wires and cable insulation are investigated in this work. The use of (3‐aminopropyl)triethoxysilane was employed as a coupling agent with some other essential additives. The composites sheet was prepared by means of the melt mixing process and go along with the compression molding process. The superior properties on compatibility between silane‐modified FA (FA(Si)) and r‐PVC were successfully studied using rheological, thermomechanical, morphological, and water absorption analysis. Primary analysis of r‐PVC and FA was employed using Fourier transform infrared spectroscopy analysis. The thermal stability of composites was stable up to 187°C. In addition, significant enhancement on tensile strength as well as young's modulus of composite as compared to untreated r‐PVC/FA composites. Morphological properties of silane treated FA based composites presented the good distribution and excellent uniformity with higher wettability of FA particles within r‐PVC matrix. The water absorption test showed decrease in water absorption with increase silane treatment concentration FA in the r‐PVC matrix. It was remarkable to note that silane treated FA can be prepared as a composite using r‐PVC matrix with further modified properties.

Glass bead effects on tribological and mechanical properties of plasticized polyvinyl chloride cable used in vehicles as a filler

“…The reason for decreasing in tensile strength can be explained by weak adhesion between GB fillers and the PVC matrix (see Figure 3 polymer, the increasing ratio in tensile modulus values for the PVC + 5 wt.% GB, PVC + 10 wt.% GB, and PVC + 20 wt.% GB composite materials were about 48.9%, 197.2%, and 351.3%, respectively. The increase in tensile modulus is in accordance with previous studies 18,19,22,27 in the literature. Figure 4 shows the variation of elongation at break and hardness values against the GBs filler content for P-PVC composite materials.…”

“…The decrease in elongation at break value is in accordance with previous studies. 18,19,21 Likewise, the variation of hardness values with the GBs filler content for GB-filled PVC composites is shown in Figure 4. It is clear from the figure that the hardness values increased with the increase of the GBs filler content in P-PVC polymer.…”

“…They reported that FA fillers with smaller particles result in better interfacial interaction and improved properties. In their other studies, 14,18,19 they observed that mechanical strength, stiffness, viscoelastic, and thermal properties increased with the addition of FA fillers into the PVC polymer matrix. Islam et al 21 studied the electrical and tensile behavior of CB reinforced PVC conductive composites.…”

“…14,15 In addition, fillers such as talc, fly ash (FA), carbon black (CB), and titanium dioxide are generally used in PVC polymer applications as well. Many studies have attempted to improve the mechanical properties and toughness of PVC polymers by the addition of calcium carbonate, 2,3,7,12,13 talc, 16,17 FA, 14,[18][19][20] CB, [21][22][23] titanium dioxide, 24 silicone dioxide, 25 and glass beads (GBs) [26][27][28] fillers. Gohatre et al 18 studied the effect of silane-treated FA fillers on the physicomechanical, thermal, and morphological properties of recycled PVC composites.…”

“…Many studies have attempted to improve the mechanical properties and toughness of PVC polymers by the addition of calcium carbonate, 2,3,7,12,13 talc, 16,17 FA, 14,[18][19][20] CB, [21][22][23] titanium dioxide, 24 silicone dioxide, 25 and glass beads (GBs) [26][27][28] fillers. Gohatre et al 18 studied the effect of silane-treated FA fillers on the physicomechanical, thermal, and morphological properties of recycled PVC composites. They observed an increase in tensile strength and elongation at break up to 20 wt.% FA content followed by a decrease.…”