Properties of recycled high density polyethylene and coffee dregs composites

Polímeros

卷:23

Jan-Hendrik Keller¹  Daniela França da Silva²  Sibele Piedade Cestari²  Jorge Pereira Chimanowsky Jr.²  Luis Claudio Mendes²  Anneliese Lang³  Rodrigo Gheno Leonhardt³  Volker Altstädt³  Vitaly Demchuk³ 

[1] Technische Universität Hamburg;

[2] Universidade Federal do Rio de Janeiro;

[3] Universität Bayreuth - Lehrstuhl für Polymere Werkstoffe;

关键词: Composites;    mechanical properties;    thermal properties;    recycling;    HDPE;   

DOI  :  10.4322/polimeros.2014.011

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown