Engineering and Technology Journal

Abstract

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.