Abstract
Extrusion blown films from Polyamide waste/metallocene linear low-density polyethylene (PAW/mLLDPE) blend based matrix system and calcium carbonates particles were successfully produced and characterized. Also, the effect of the extruder temperature used during twin-screw compounding, the coupling agent loading and PA loading on the mechanical properties of the obtained films were studied. The key aspect of the present study was in investigating the optimal combination of factors by using Design of Experiment (DOE) approach. The responses measured were the tensile strength in the machine direction (MD) and the tensile strength in the transverse direction (TD). Among the selected processing parameters, the coupling agent and the interaction between the coupling agent and the PA loading have the most important influence on the tensile strength.
Highlights
Nowadays, plastic recycling is becoming an important challenge
The aim of the present work is to optimize the fabrication of plastic films using PA wastes (PA-W)/metallocene linear low-density polyethylene (mLLDPE) matrix with calcium carbonate as the reinforcing agent and varying several processing conditions
When comparing the results obtained for all the blends, it can be seen that the increase in the coupling agent loading from 2.5% to 5% increases the tensile stress in the machine direction and in the transverse direction for at least 40% for both configurations
Summary
The volumes of plastic wastes are increasing day by day, requiring effective recycling processes of different kinds of materials in a cost-efficient way [1]. Several advances have been achieved in the plastic recycling technology; depolymerization by chemical recycling is a way to replay original monomers [3]. This method is difficult to achieve due to the complexity of systems and high cost of operation. The burning of polymers to recover energy is used too. In this case, environmental benefits are debatable [4]. PA-W/metallocene linear low-density polyethylene (mLLDPE) composite blends were produced using high-shear mixing twin screw extruder and the films were manufactured using a blown film extrusion process
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