Publisher DOI: 10.4322/polimeros.2014.011
Title: Properties of recycled high density polyethylene and coffee dregs composites
Language: English
Authors: Cestari, Sibele 
Mendes, Luis Claudio 
Silva, Daniela Franc̜a da 
Chimanowsky, Jorge Pereira 
Altstädt, Volker 
Demchuk, Vitaly 
Lang, Anneliese 
Leonhardt, Rodrigo Gheno 
Keller, Jan-Hendrik 
Keywords: composites;mechanical properties;thermal properties;recycling;HDPE
Issue Date: 2013
Publisher: Associação Brasileira de Polímeros
Source: Polimeros 6 (23): 733-737 (2013)
Journal or Series Name: Polímeros 
Abstract (english): Composites of recycled high density polyethylene (HDPE-R) and coffee dregs (COFD) were elaborated. The blends were made at the proportions of 100-0, 90-10, 80-20, 70-30, 60-40, 50-50 and 40-60% polymer-filler ratio. The materials were evaluated through scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry/derivative thermogravimetry (TGA), and compressive resistance test. The compounding was done using a two-stage co-kneader system extruder, and then cylindrical specimens were injection molded. All composites had a fine dispersion of the COFD into the polymeric matrix. The composites degraded in two steps. The first one was in a temperature lower than the neat HDPE, but higher than the average processing temperature of the polymer. The melting temperature and the degree of crystallinity of the composites resulted similar to the neat HDPE ones. The compressive moduli of the composites resulted similar to the neat polymer one. The results show that these composites have interesting properties as a building material.
ISSN: 1678-5169
Institute: Biomechanik M-3 
Type: (wissenschaftlicher) Artikel
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