86351 20210930085403.0 doi 10.3390/polym11101692 sideral 114938 ART-2019-114938 eng Matxinandiarena, Eider The effect of titanium dioxide surface modification on the dispersion, morphology, and mechanical properties of recycled PP/PET/TiO2 PBNANOs 2019 Access copy available to the general public Unrestricted Titanium dioxide (TiO2) nanoparticles have recently appeared in PET waste because of the introduction of opaque PET bottles. We prepare polymer blend nanocomposites (PBNANOs) by adding hydrophilic (hphi), hydrophobic (hpho), and hydrophobically modified (hphoM) titanium dioxide (TiO2) nanoparticles to 80rPP/20rPET recycled blends. Contact angle measurements show that the degree of hydrophilicity of TiO2 decreases in the order hphi > hpho > hphoM. A reduction of rPET droplet size occurs with the addition of TiO2 nanoparticles. The hydrophilic/hydrophobic balance controls the nanoparticles location. Transmission electron microscopy (TEM_ shows that hphi TiO2 preferentially locates inside the PET droplets and hpho at both the interface and PP matrix. HphoM also locates within the PP matrix and at the interface, but large loadings (12%) can completely cover the surfaces of the droplets forming a physical barrier that avoids coalescence, leading to the formation of smaller droplets. A good correlation is found between the crystallization rate of PET (determined by DSC) and nanoparticles location, where hphi TiO2 induces the highest PET crystallization rate. PET lamellar morphology (revealed by TEM) is also dependent on particle location. The mechanical behavior improves in the elastic regime with TiO2 addition, but the plastic deformation of the material is limited and strongly depends on the type of TiO2 employed. info:eu-repo/grantAgreement/EUR/INTERREG VA-POCTEFA/EFA064-15-REVALPET info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.426 2019 POLYMER SCIENCE 16 / 89 = 0.18 2019 Q1 T1 0.704 2019 Polymers and Plastics 2019 Q1 Chemistry (miscellaneous) 2019 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Múgica, Agurtzane Zubitur, Manuela Yus, Cristina Universidad de Zaragoza (orcid)0000-0002-1505-498X Sebastián, Víctor Universidad de Zaragoza (orcid)0000-0002-6873-5244 Irusta, Silvia Universidad de Zaragoza (orcid)0000-0002-2966-9088 Loaeza, Alfonso David Santana, Orlando Maspoch, Maria Lluisa Puig, Cristian Müller, Alejandro J. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 11, 10 (2019), 1692 [22 pp.] Polymers (Basel) POLYMERS 2073-4360 9039204 http://zaguan.unizar.es/record/86351/files/texto_completo.pdf Versión publicada 104334 http://zaguan.unizar.es/record/86351/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:86351 articulos driver 2021-09-30-08:26:53 ARTICLE