Preparation and Study of Polymer Blends Based on PLA

U ovom radu pripremljene su polimerne mješavine polilaktida (PLA), polietilena visoke gustoće (PE-HD) i polietilena niske gustoće (PE-LD) u različitim omjerima. Umješavanje polimera i njihovih mješavina izvršeno je pomoću ekstrudera i gnjetilice, nakon čega su im određena mehanička, toplinska i morfološka svojstva. Rezultati mehaničkih ispitivanja pokazali su da dodatak polietilena (PE-LD i PE-HD) čistom polilaktidu znatno mijenja njegova mehanička svojstva. Analiza provedena na pretražnom elektronskom miskroskopu (SEM) i razlikovnom pretražnom kalorimetru (DSC) pokazala je da ispitani polimeri nisu mješljivi. Ispitivane polimerne mješavine djelomično su biorazgradljive, a postignuto je i smanjenje cijene materijala u usporedbi s čistim polilaktidom. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.In this study, polymeric blends of polylactide (PLA), high density polyethylene (PE-HD) and low density polyethylene (PE-LD) in different ratios were prepared. Blending of polymers with an extruder and a kneader was performed. Mechanical, thermal, and morphological properties of the prepared blends were determined. The results of mechanical testing showed that the addition of polyethylene (PE-LD and PE-HD) to pure polylactide significantly changed the mechanical properties of the material. The analysis performed on the scanning electron microscope (SEM) and the differential scanning calorimeter (DSC) showed that the investigated polymers were immiscible. The investigated polymer blends were partially biodegradable, while material price decreased compared to pure polylactide. This work is licensed under a Creative Commons Attribution 4.0 International License