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Pine Resin Derivatives as Sustainable Additives to Improve the Mechanical and Thermal Properties of Injected Moulded Thermoplastic Starch

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Aldas, Miguel and Pavon, Cristina and López-Martínez, Juan and Arrieta Dillon, Marina Patricia (2020) Pine Resin Derivatives as Sustainable Additives to Improve the Mechanical and Thermal Properties of Injected Moulded Thermoplastic Starch. Applied Sciences, 10 (7). p. 2561. ISSN 2076-3417

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Official URL: https://doi.org/10.3390/app10072561




Abstract

Fully bio-based materials based on thermoplastic starch (TPS) were developed starting from corn starch plasticized with glycerol. The obtained TPS was further blended with five pine resin derivatives: gum rosin (GR), disproportionated gum rosin (dehydroabietic acid, RD), maleic anhydride modified gum rosin (CM), pentaerythritol ester of gum rosin (LF), and glycerol ester of gum rosin (UG). The TPS–resin blend formulations were processed by melt extrusion and further by injection moulding to simulate the industrial conditions. The obtained materials were characterized in terms of mechanical, thermal and structural properties. The results showed that all gum rosin-based additives were able to improve the thermal stability of TPS, increasing the degradation onset temperature.
The carbonyl groups of gum rosin derivatives were able to interact with the hydroxyl groups of starch and glycerol by means of hydrogen bond interactions producing a significant increase of the glass transition temperature with a consequent stiffening effect, which in turn improve the overall mechanical performance of the TPS-resin injected moulded blends. The developed TPS–resin blends are of interest for rigid packaging applications.


Item Type:Article
Uncontrolled Keywords:Bioplastic; corn starch; glycerol; thermoplastic starch; gum rosin; injection-moulding
Subjects:Medical sciences > Biology > Biotechnology
ID Code:62947
Deposited On:04 Nov 2020 15:02
Last Modified:04 Nov 2020 15:02

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