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Structure characterization and biodegradation rate of poly(.epsilon.-caprolactone)/starch blends

SYSNO ASEP	0524738
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Structure characterization and biodegradation rate of poly(.epsilon.-caprolactone)/starch blends
Author(s)	Nevoralová, Martina (UMCH-V)_{RID, ORCID} Koutný, M. (CZ) Ujčić, Aleksanda (UMCH-V)_{RID, ORCID} Starý, Zdeněk (UMCH-V)_RID Šerá, J. (CZ) Vlková, Helena (UMCH-V) Šlouf, Miroslav (UMCH-V)_{RID, ORCID} Fortelný, Ivan (UMCH-V)_RID Kruliš, Zdeněk (UMCH-V)_{RID, ORCID}
Article number	141
Source Title	Frontiers in Materials. - : Frontiers Media - ISSN 2296-8016 Roč. 7, 5 June (2020), s. 1-14
Number of pages	14 s.
Language	eng - English
Country	CH - Switzerland
Keywords	poly (epsilon-caprolactone) ; thermoplastic starch ; biodegradation rate
Subject RIV	CD - Macromolecular Chemistry
OECD category	Polymer science
R&D Projects	NV15-31269A GA MZd - Ministry of Health (MZ)
	TE01020118 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
	TN01000008 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
	LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	UMCH-V - RVO:61389013
UT WOS	000543185200001
EID SCOPUS	85086771326
DOI	10.3389/fmats.2020.00141
Annotation	The present paper focuses on the effects of blending poly (ε-caprolactone) (PCL) with thermoplastic starch (TPS) on the final biodegradation rate of PCL/TPS blends, emphasizing the type of environment in which biodegradation takes place. The blends were prepared by melt-mixing the components before a two-step processing procedure, which strongly affects the degree of plasticization and therefore the final material morphology, as was detailed in the previous work, was used for the thermoplastic starch. The concentration row of pure PCL over PCL/TPS blends to pure TPS was analyzed for biodegradation in two different environments (compost and soil), as well as from a morphological, thermomechanical, rheological, and mechanical point of view. The morphology of all the samples was studied before and after biodegradation. The biodegradation rate of the materials was expressed as the percentage of carbon mineralization, and significant changes, especially after exposure in soil, were recorded. The crystallinity of the measured samples indicated that the addition of thermoplastic starch has a negligible effect on PCL-crystallization. The blend with 70% of TPS and a co-continuous morphology demonstrated very fast biodegradation, with the initial rate almost identical to pure TPS in both environments while the 30% TPS blend exhibited particle morphology of the starch phase in the PCL matrix, which probably resulted in a dominant effect of the matrix on the biodegradation course. Moreover, some molecular interaction between PCL and TPS, as well as differences in flow and mechanical behavior of the blends, was determined.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2021
Electronic address	https://www.frontiersin.org/articles/10.3389/fmats.2020.00141/full

Number of the records: 1