Affiliation:
1. Dipartimento di Ingegneria e Architettura (DIA) and INSTM RU, Università di Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
2. Dipartimento di Scienze Chimiche, Della Vita e della Sostenibilità Ambientale (SCVSA), Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
3. Dipartimento di Scienza Applicata e Tecnologia (DISAT) and INSTM RU, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Abstract
Mechanical properties of polymer biocomposites are influenced by the interaction between the matrix and the filler surface. In this work, composites based on poly(butylene-adipate-terephthalate) (PBAT) filled with micrometric particles of zein-TiO2 complex (ZTC) were realized via solvent casting technique at different concentrations, equal to 0, 5, 10, and 20 wt%. After pelletization, the resulting materials were injection molded into standard specimens, employed for the uniaxial tensile test (UTT) characterization. From the stress-strain curves, Young’s modulus (
), yield stress (
), stress at break (
), elongation at break (
), and toughness (
) were collected. The addition of the ZTC proved to show a reinforcing effect on the polymeric matrix, with an increase in both
and
. Modelling of the mechanical properties was performed by applying Kerner’s and Pukánszky’s equations. Kerner’s model, applied on experimental
values, returned a very good correspondence between collected and theoretical values. From the application of Pukánszky’s model to
, the obtained
value showed a good interfacial interaction between the matrix and the filler. Due to the enhanced stiffness of the composites, a reduction in the true stress at break (
) was observed. The modified Pukánszky’s model gave a
value lower than the one obtained for the yield, but still in the range of acceptable values for microcomposites.
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering,Mechanics of Materials
Cited by
1 articles.
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