For the purpose of extending the applicability ﬁelds of thermoplastic starch (TPS), a study on their properties with high ﬁller loadings was performed. Two diﬀerent organic natural reinforcements (cellulose and ﬂax) and a typical mineral ﬁller (talc) were incorporated in TPS using melt blending. The resulting composites were observed on fragile fracture surfaces by scanning electron microscopy to study the ﬁller/matrix adhesion. Magniﬁcations revealed good TPS−ﬁbre interfacial interac t ion with limited debonding. The thermomechanical properties by dynamic mechanical thermal analysis (DMTA) and the correlation with the ﬁller amount (from 10 to 50 wt%) were thoroughly investigated at 50% relative humidity and 23°C. The tests evidenced a huge increase in composite storage moduli (E′) of more than 200% with respect to the neat matrix. Moreover, the resulting DMTA experimental data were interpolated with the Cox − Krenchel micromechanical model. To this aim, the necessary measures of the ﬁller dimensions were calculated after the extrusion process on water-dissolved residues using an optical microscope. This model was able to correctly follow the experimental results also at high ﬁller loadings.
|Titolo:||Thermomechanical improvement of glycerol plasticized maize starch with high loading of cellulose, flax and talc fillers|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1002/pi.5129|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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|Battegazzore, Bocchini, Frache - 2016 - Thermo-mechanical improvement of glycerol plasticized maize starch (TPS) with high loading of ce.pdf||manuscript||4. Altro||Non Pubblico - Accesso privato/ristretto||Administrator Richiedi una copia|