Abstract
Low-density polyethylene (LDPE) and ethylene vinyl acetate copolymer (EVA), which are non-polar and polar polymers, are immiscible and form a polyphase system. In this study, LDPE was mixed with 2.5%, 5%, 7.5%, 10%, 12.5% Ethylene-vinyl acetate (EVA-28) with a medium content of vinyl acetate (28% VA), respectively by injection molding machine and LDPE. Tensile strength and flexural strength were tested according to ASTM D638-02 standard and ISO 178 standard. The results showed that adding EVA-28 increased the elongation at break of the LDPE/2.5% EVA, LDPE/5% EVA and LDPE/10% EVA blend samples. In addition, the tensile and flexural strength of the LDPE/EVA blend decreases gradually as the EVA-28 content in the blend increases. The hardness decreases with the increasing EVA-28 content. EVA-28 spherical particles appeared scattered on the surface of the LDPE matrix, in the highest EVA-28 percent sample (12.5% EVA-28), the number of particles appeared to be quite a lot, and was dispersed quite evenly on the surface. The LDPE/EVA-28 blend achieved a higher elongation at the break than LDPE, in which 10% EVA-28 gives the highest elongation at break.
Highlights
The recycling and reuse of plastic waste films created from greenhouses is a global environmental problem
The low-density polyethylene (LDPE)/ethylene-vinyl acetate (EVA)-28 blend achieved a higher elongation at the break than LDPE, in which 10% EVA-28 gives the highest elongation at break
[17] These results demonstrate that the viscosity and elasticity are higher in LDPE compared to EVA
Summary
The recycling and reuse of plastic waste films created from greenhouses is a global environmental problem. Its branching structure and melting temperature are the same as EVA For this reason, choosing LDPE blended with EVA can overtake the restrictions of each of the constituent polymers, contributing to increased mechanical properties [12,13,14]. Faker et al [17] These results demonstrate that the viscosity and elasticity are higher in LDPE compared to EVA This can lead to a better surface adhesion and efficient stress transfer from the substrate to the dispersed phase and 10%, and 25% EVA blends have a smoother morphology and a better distribution. There are some studies showing that the adding EVA to the LDPE/EVA blend and the PE/EVA blend will turn down elongation at the break and impact on the mechanical properties
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