title: Enhancement of interfacial adhesion between starch and grafted poly(ε-caprolactone).
abstract: The use of a modified poly(ε-caprolactone) (gPCL) to enhance polymer miscibility in films based on thermoplastic starch (S) and poly(ε-caprolactone) is reported. PCL was functionalized by grafting with maleic anyhdride (MA) and/or glycidyl methacrylate (GMA) by reactive blending in a batch mixer. gPCL based materials were analysed in terms of their grafting degree, structural and thermal properties. Blends based on starch and PCL (wt. ratio 80:20) with including gPCL (0, 2.5 and 5wt.%), as a compatibilizer, were obtained by extrusion and compression moulding, and their structural, thermal, mechanical and barrier properties were investigated. Blends containing gPCL evidenced better interfacial adhesion between starch and PCL domains, as deduced from both structural (XRD, FTIR, SEM) and bulk properties (DSC, TGA). Moreover, grafted PCL-based compatibilizers greatly improved functional properties of S-PCL blend films, as pointed out from mechanical performance and higher barrier properties, valuable to meet the food packaging requirements.
authors.affiliation: Instituto de Ingeniería de Alimentos para el Desarrollo, Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. Electronic address: rodorto@etsiamn.upv.es.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Ortega-Toro
authors.affiliation: Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei, 34, Pozzuoli, 80078 Na, Italy. Electronic address: gabriella.santagata@ipcb.cnr.it.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Santagata
authors.affiliation: Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei, 34, Pozzuoli, 80078 Na, Italy.
authors.forename: Giovanna
authors.initials: G
authors.lastname: Gomez d'Ayala
authors.affiliation: Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei, 34, Pozzuoli, 80078 Na, Italy.
authors.forename: Pierfrancesco
authors.initials: P
authors.lastname: Cerruti
authors.affiliation: Instituto de Ingeniería de Alimentos para el Desarrollo, Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: Pau
authors.initials: P
authors.lastname: Talens Oliag
authors.affiliation: Instituto de Ingeniería de Alimentos para el Desarrollo, Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: M Amparo
authors.initials: MA
authors.lastname: Chiralt Boix
authors.affiliation: Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei, 34, Pozzuoli, 80078 Na, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Malinconico
mesh_terms: D018857:Food Packaging; D011091:Polyesters / Q000737:chemistry* / Q000378:metabolism; D013213:Starch / Q000737:chemistry* / Q000378:metabolism
chemical_list: D011091:Polyesters; C016240:polycaprolactone; D013213:Starch
keywords: Glycidyl methacrylate; Grafted polycaprolactone; Interfacial adhesion; Maleic anhydride; Starch