NDLI: Rheological Characteristics of Starch-Based Biodegradable Blends.

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Rheological Characteristics of Starch-Based Biodegradable Blends.

Content Provider	Europe PMC
Author	Park, Dong-Il Dong, Yuzhen Wang, Shizhao Lee, Soo-Jeong Choi, Hyoung Jin
Editor	Dai, Shaocong
Copyright Year	2023
Abstract	Thermoplastic starch was blended with commercially available biodegradable polyesters of poly(butylene adipate-co-terephthalate) (PBAT) and poly(lactic acid) (PLA) for its improved performance and processability. The morphology and elemental composition of these biodegradable polymer blends were observed by scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively, while their thermal properties were analyzed using thermogravimetric analysis and differential thermal calorimetry. For rheological analysis, the steady shear and dynamic oscillation tests of three samples at various temperatures were investigated using a rotational rheometer. All three samples exhibited significant shear thinning at all measured temperatures, and their shear viscosity behavior was plotted using the Carreau model. The frequency sweep tests showed that the thermoplastic starch sample exhibited a solid state at all temperatures tested, whereas both starch/PBAT and starch/PBAT/PLA blend samples exhibited viscoelastic liquid behavior after the melting temperature such that their loss modulus at low frequencies was greater than the storage modulus, and inversion occurred at high frequencies (storage modulus > loss modulus).
Journal	Polymers
Volume Number	15
PubMed Central reference number	PMC10146951
Issue Number	8
PubMed reference number	37112100
e-ISSN	20734360
DOI	10.3390/polym15081953
Language	English
Publisher	MDPI
Publisher Date	2023-04-20
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2023 by the authors.
Subject Keyword	starch biodegradable poly(butylene adipate-co-terephthalate) poly(lactic acid) melt rheology
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics

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