The effect of blending of linear low –density polyethylene on mechanical properties of high density pblyethlene

الملخص EN

High – density polyethylene is an important commercial polymer and it is widely used for different engineering applications.

In the present work, polymer blends were fabricated by mixing two types of polyethylene, high – density polyethylene was mixed with different weight percent of linear – low – density polyethylene using two – roll mill, the mixing machine was operated at a temperature of 135oC.

A series of standard tests (destructive), tensile, impact, hardness, and compression were carried out on the prepared samples it was found that the addition of linear – low – density polyethylene to the high – density polyethylene leads to decrease in the modulus of elasticity, tensile strength, tensile strength at break and increase in the % elongation at break.

For the impact test it was found that the addition of linear – low – density polyethylene caused an increase in the impact strength of the material, the polymer blend with 45 % wt of linear – low – density polyethylene gave the highest value of impact strength.

On the other hand the hardness test was carried out and it was found that the addition of linear – low – density polyethylene leads to decrease the hardness of the polymer blends.

Therefore, the neat high – density polyethylene gave the highest hardness value.