{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T14:47:38Z","timestamp":1773413258502,"version":"3.50.1"},"reference-count":50,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2022,3,12]],"date-time":"2022-03-12T00:00:00Z","timestamp":1647043200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/polym14061144","type":"journal-article","created":{"date-parts":[[2022,3,13]],"date-time":"2022-03-13T21:44:17Z","timestamp":1647207857000},"page":"1144","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Thermal and Rheological Characterization of Recycled PET\/Virgin HDPE Blend Compatibilized with PE-g-MA and an Epoxy Chain Extender"],"prefix":"10.3390","volume":"14","author":[{"given":"Raquel M.","family":"Santos","sequence":"first","affiliation":[{"name":"Postgraduate in Process Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3613-3780","authenticated-orcid":false,"given":"Anna R. M.","family":"Costa","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Federal University of Pernambuco, Recife 50740-520, Brazil"}]},{"given":"Y\u00eada M. B.","family":"Almeida","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Federal University of Pernambuco, Recife 50740-520, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3118-0123","authenticated-orcid":false,"given":"Laura H.","family":"Carvalho","sequence":"additional","affiliation":[{"name":"Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1026-4523","authenticated-orcid":false,"given":"Jo\u00e3o M. P. Q.","family":"Delgado","sequence":"additional","affiliation":[{"name":"CONSTRUCT-LFC, Department of Civil Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal"}]},{"given":"Elisiane S.","family":"Lima","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7849-2792","authenticated-orcid":false,"given":"Hort\u00eancia L. F.","family":"Magalh\u00e3es","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4387-4600","authenticated-orcid":false,"given":"Ricardo S.","family":"Gomez","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"given":"Boniek E.","family":"Leite","sequence":"additional","affiliation":[{"name":"Postgraduate in Process Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]},{"given":"Fagno D.","family":"Rolim","sequence":"additional","affiliation":[{"name":"Teacher Training Center, Federal University of Campina Grande, Cajazeiras 58900-000, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8025-8911","authenticated-orcid":false,"given":"Maria J.","family":"Figueiredo","sequence":"additional","affiliation":[{"name":"Department of Agro-Industrial Management and Technology, Federal University of Para\u00edba, Bananeiras 58220-000, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1691-1872","authenticated-orcid":false,"given":"Antonio G. B.","family":"Lima","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1994","DOI":"10.1002\/pola.1175","article-title":"Poly(ethylene terephthalate) copolymers containing 5- tert -butyl isophthalic units","volume":"39","author":"Kint","year":"2001","journal-title":"J. Polym. Sci. Part A Polym. Chem."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1473","DOI":"10.1002\/1521-3935(200207)203:10\/11<1473::AID-MACP1473>3.0.CO;2-4","article-title":"Compatibilization and properties of poly(ethylene terephthalate)\/polyethylene blends based on recycled materials","volume":"203","author":"Pracella","year":"2002","journal-title":"Macromol. Chem. 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