Development of composites based on a blend of recycled HDPE/post-consumer PET and bentonite clay

Abstract

The recycling process is the best way to manage waste polymers. From an economic standpoint, more investigation is needed of the whole recycling process to enhance the competitiveness in these systems. A first step is improved interaction and interfacial adhesion of blends. Polyethylene (PE) and polyethylene terephthalate (PET) are incompatible polymers, so their blends in general have poor properties. Compatibilization is thus a necessary step to obtain blends with good mechanical and barrier properties. In this work, blends of recycled (high density polyethylene) (HDPE) and post-consumer PET, with organophilic bentonite clay acting as compatibilization agent at the interface of the two polymers, were obtained. The proportions of HDPE/PET/bentonite (0, 5, 10 and 15% weight percentage of bentonite) were processed by extrusion. The processed materials were characterized regarding density (ASTM D792-13), melt flow index (MFI, ASTM D1238-13), hardness (ASTM D2240–10), infrared absorption spectroscopy (FTIR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results indicated the occurrence of some compatibilization.

Post-consumer high density polyethylene/zirconium phosphate and aluminum hydroxide composites: Assessment of physico-mechanical and flame retardancy properties

“…rHDPE diffraction angles at 21.7 and 24.1 were noticed like published by Lima and co-authors. 32 rHPDE-ZrP composite showed standard diffraction angles of the rHDPE and additional 2θ angles around at 12° ( hkl ); 20; 21.7; 24.2 and 25.3° attributed to ZrP. rHDPE-Al(OH) 3 and rHDPE-ZrPOct/Al(OH) 3 composites only presented 2θ angles of rHDPE.…”

Influência Do Tipo De Compatibilizante Nas Propriedades De Blendas De Matrizes Poliméricas Recicláveis

“…Tais propriedades derivam do empacotamento elevado, facilitada pela concentração reduzida de ramificação; tornando as cadeias mais lineares e, por meio da aproximação das ligações, intensificando as forças Van der Waals. Similarmente, o PP apresenta propriedades comparáveis ao PEAD, como resistência à tração e rigidez, além de ser quimicamente inerte em diversos meios e possuir boa estabilidade química (LIMA et al, 2023;MACHADO et al, 2023;CECON et al, 2021;GONÇALVES et al, 2019;COUTINHO et al, 2003;). Devido ao grande descarte e geração de resíduos de PEAD e PP, a importância da reciclagem aumenta (SOUZA et al, 2022;COELHO et al, 2020;).…”