The Effect of NCO-Polyol on the Properties of Low-Density Polyethylene/Water Hyacinth Fiber (Eichhornia crassiper) Composites

Abstract

Low density polyethylene (LDPE)/modified water hyacinth fiber (WHF) composites have been prepared by melt blending. All the composites were characterized by tensile test, differential scanning calorimetry (DSC), water absorption behaviour, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results indicated that LDPE/WHF composites with NCO-polyol as a coupling agent show higher values of tensile strength, Young's modulus and water absorption resistance but lower elongation at break than LDPE/WHF composites without NCO-polyol. The micrographs of SEM showed that the WHF were more widely dispersed in the LDPE matrix with the addition of the NCO-polyol as a coupling agent. It was also found that the modified WHF offers better thermal stability in the LDPE/WHF composites than unmodified WHF.

Effect of Coupling Agent Concentration, Fiber Content, and Size on Mechanical Properties of Wood/HDPE Composites

“…They concluded that the increasing addition of wood flour caused a small but progressive improvement of the decomposition temperature of the composites, whereas the glass transition temperature remained practically unchanged, and a gradual decrease in T 1 H values was observed with increasing wood content, indicating that the composites became less rigid. Nourbakhsh and Ashori [16] investigated four levels of fiber loading (10,20,30, and 40 wt%) on the mechanical properties of poplar=PP composites. They found that the fiber loading of 30 and 40 wt% at 190 C provided adequate reinforcement to increase the tensile and flexural strength of the PP power, the modulus increased, and the elongation and impact properties of the composites decreased with increasing the fiber content.…”

“…A variety of natural materials have been used in WPCs [18][19][20][21]. Among the various natural materials, wood fibers have attracted considerable attention in the fields of both fundamental research and applications due to their ease of handling and widespread availability [22].…”

Enhancing interfacial adhesion performance by using poly(vinyl alcohol) in (low‐density polyethylene)/(natural rubber)/(water hyacinth fiber) composites

“…The crystallinity of the composites was determined by using the relationship where Δ H f and Δ H ° f are enthalpy of fusion of the composite and enthalpy of fusion of LDPE, respectively. The value for Δ H ° f (LDPE) is 293.6 J/g .…”

“…where DH f and DH8 f are enthalpy of fusion of the composite and enthalpy of fusion of LDPE, respectively. The value for DH8 f (LDPE) is 293.6 J/g [1,2].…”

Effects of (conductive polypyrrole)‐modified tire dust on the mechanical, electrical, and morphology properties of (low‐density polyethylene)/(tire dust) composites

“…Blending polymers with fillers is a common industrial practice for various types of polymer, which leads to properties that are superior to those of the component polymers alone. The addition of inorganic fillers to polymers has received considerable attention lately [1][2][3], for economic reasons as well as for the favorable modification of mechanical, electrical, and thermal properties [4].…”