2026-04-14T18:30:56Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/455632025-01-31T08:18:23Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

Asensio Valentín, María Nuñez Carrero, Karina Carla Guerrero Fernández, Julia Herrero Villar, Manuel Merino Senovilla, Juan Carlos Pastor Barajas, José María 2021-03-08T13:34:50Z 2021-03-08T13:34:50Z 2020 Polymer Degradation and Stability, 2020, vol. 179. 11 p. 0141-3910 http://uvadoc.uva.es/handle/10324/45563 10.1016/j.polymdegradstab.2020.109258 109258 Polymer Degradation and Stability 179 The use of recycled PET (rPET) in long-term applications, such as composites, may provide an environmentally friendly solution for PET wastes. Main problem to overcome to use rPET in composites is its high viscosity which compromises the impregnation with the fibers during the consolidation process. As it is well known, PET undergoes thermo-mechanical and hydrolytic degradation during its mechanical recycling decreasing its viscosity and causing a loss of mechanical properties. For this reason, this paper takes into consideration a rheological modification during mechanical recycling to achieve the necessary fluidity for composites while maintaining the mechanical properties. Rheological modification was carried out by physical and chemical methods. Physical method was realized through blending with virgin PET (vPET) of low melt viscosity. Chemical method was performed on rPET, vPET and its blends by reactive extrusion. The effect of rheological modifications on the final thermal and mechanical properties was studied. Main results showed that both methods are able to decrease the viscosity without compromising mechanical properties. In addition, the chemical method during the reactive extrusion provided higher Elastic Modulus values. Ministerio de Economía, industria y Competitividad (Project MAT2017-85101-C2-1-R) Junta de Castilla y León-Instituto para la Competitividad Empresarial de Castilla y León (projects VA071G18 and CCTT2/18/VA/0002) Ministerio de Ciencia, Innovación y Universidades (project PTQ-16-0844) application/pdf spa Elsevier info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Elsevier Attribution-NonCommercial-NoDerivatives 4.0 Internacional Materials Materiales Poly(ethylene terephthalate) Tereftalato de polietileno Mechanical recycling Reciclado mecánico Reología Rheological modification of recycled poly(ethylene terephthalate): Blending and reactive extrusion info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0141391020301907 SI