Santos Raquel M, Costa Anna R M, Almeida Yêda M B, Carvalho Laura H, Delgado João M P Q, Lima Elisiane S, Magalhães Hortência L F, Gomez Ricardo S, Leite Boniek E, Rolim Fagno D, Figueiredo Maria J, Lima Antonio G B
Postgraduate in Process Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil.
Department of Chemical Engineering, Federal University of Pernambuco, Recife 50740-520, Brazil.
Polymers (Basel). 2022 Mar 12;14(6):1144. doi: 10.3390/polym14061144.
In this work, recycled poly(ethylene terephthalate) (PETR) was blended with virgin high-density polyethylene (HDPE) in an internal mixer in an attempt to obtain a material with improved properties. A compatibilizer (PE-g-MA) and a chain extender (Joncryl) were added to the PETR/HDPE blend and the rheological and thermal properties of the modified and unmodified blends as well as those of virgin PET with virgin HDPE (PETV/HDPE). All the blends were characterized by torque rheometry, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The data obtained indicate that the incorporation of either the chain extender or the compatibilizer agent led to increases in torque (and hence in viscosity) of the blend compared to that of the neat polymers. The joint incorporation of the chain extender and compatibilizer further increased the viscosity of the systems. Their effect on the crystallinity parameters of HDPE was minimal, but they reduced the crystallinity and crystallization temperature of virgin and recycled PET in the blends. The thermal stability of the PETR/HDPE blend was similar to that of the PETV/HDPE blend, and it was not affected by the incorporation of the chain extender and/or compatibilizer.
在本研究中,将回收聚对苯二甲酸乙二酯(PETR)与原始高密度聚乙烯(HDPE)在密炼机中进行共混,以期获得性能改善的材料。向PETR/HDPE共混物中添加了相容剂(PE-g-MA)和扩链剂(Joncryl),并对改性和未改性共混物以及原始PET与原始HDPE(PETV/HDPE)的流变性能和热性能进行了研究。所有共混物均通过转矩流变仪、差示扫描量热法(DSC)和热重分析(TGA)进行表征。所得数据表明,与纯聚合物相比,添加扩链剂或相容剂均会导致共混物的转矩(进而粘度)增加。扩链剂和相容剂的共同添加进一步提高了体系的粘度。它们对HDPE结晶度参数的影响极小,但降低了共混物中原始和回收PET的结晶度及结晶温度。PETR/HDPE共混物的热稳定性与PETV/HDPE共混物相似,且不受扩链剂和/或相容剂添加的影响。