title: Isosorbide, a green plasticizer for thermoplastic starch that does not retrogradate.
abstract: Isosorbide is a non-toxic biodegradable diol derived from bio-based feedstock. It can be used for preparing thermoplastic starch through a semi-industrial process of extrusion. Isosorbide allows some technological advantages with respect to classical plasticizers: namely, direct mixing with starch, energy savings for the low processing temperature required and lower water uptake. Indeed, maize starch was directly mixed with the solid plasticizer and direct fed in the main hopper of a co-rotating twin screw extruder. Starch plasticization was assessed by X-ray diffraction (XRD) and dynamic-mechanical analysis (DMTA). Oxygen permeability, water uptake and mechanical properties were measured at different relative humidity (R.H.) values. These three properties turned out to be highly depending on the R.H. No retrogradation and changing of the material properties were occurred from XRD and DMTA after 9 months.
authors.affiliation: Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy. Electronic address: daniele.battegazzore@polito.it.
authors.forename: Daniele
authors.initials: D
authors.lastname: Battegazzore
authors.affiliation: Center for Space Human Robotics@PoliTo, Istituto Italiano di Tecnologia, C.so Trento 21, 10129 Torino, Italy.
authors.forename: Sergio
authors.initials: S
authors.lastname: Bocchini
authors.affiliation: MAIP Srl, Via Verga 30, 10036 Settimo Torinese (To), Italy.
authors.forename: Gabriele
authors.initials: G
authors.lastname: Nicola
authors.affiliation: MAIP Srl, Via Verga 30, 10036 Settimo Torinese (To), Italy.
authors.forename: Eligio
authors.initials: E
authors.lastname: Martini
authors.affiliation: Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy.
authors.forename: Alberto
authors.initials: A
authors.lastname: Frache
mesh_terms: D055119:Elastic Modulus; D005990:Glycerol / Q000737:chemistry; D007547:Isosorbide / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010539:Permeability; D010968:Plasticizers / Q000737:chemistry*; D010969:Plastics / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D003313:Zea mays / Q000737:chemistry
chemical_list: D010968:Plasticizers; D010969:Plastics; D014867:Water; D013213:Starch; D005990:Glycerol; D010100:Oxygen; D007547:Isosorbide
keywords: Isosorbide; Mechanical properties; Oxygen permeability; Plasticization; Starch; TPS