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Open AccessArticle

Broadband Dielectric Spectroscopy Study of Biobased Poly(alkylene 2,5-furanoate)s’ Molecular Dynamics

1
Civil, Chemical, Environmental and Materials Engineering Department, University of Bologna, Via Terracini 28, 40131 Bologna, Italy
2
Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), P. Manuel Lardizábal 3, E-20018 San Sebastián, Spain
3
Centro de Física de Materiales (CSIC–UPV/EHU), P. Manuel Lardizábal 5, E-20018 San Sebastián, Spain
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(6), 1355; https://doi.org/10.3390/polym12061355
Received: 21 May 2020 / Revised: 10 June 2020 / Accepted: 13 June 2020 / Published: 16 June 2020
(This article belongs to the Special Issue Synthesis, Characterization and Simulation of Soft Matter with EUSMI)
Poly(2,5-alkylene furanoate)s are bio-based, smart, and innovative polymers that are considered the most promising materials to replace oil-based plastics. These polymers can be synthesized using ecofriendly approaches, starting from renewable sources, and result into final products with properties comparable and even better than those presented by their terephthalic counterparts. In this work, we present the molecular dynamics of four 100% bio-based poly(alkylene 2,5-furanoate)s, using broadband dielectric spectroscopy measurements that covered a wide temperature and frequency range. We unveiled complex local relaxations, characterized by the simultaneous presence of two components, which were dependent on thermal treatment. The segmental relaxation showed relaxation times and strengths depending on the glycolic subunit length, which were furthermore confirmed by high-frequency experiments in the molten region of the polymers. Our results allowed determining structure–property relations that are able to provide further understanding about the excellent barrier properties of poly(alkylene 2,5-furanoate)s. In addition, we provide results of high industrial interest during polymer processing for possible industrial applications of poly(alkylene furanoate)s. View Full-Text
Keywords: 2,5-furandicarboxylic acid; poly(2,5-alkylene furanoate)s; broadband dielectric spectroscopy; molecular dynamics; bio-based polymers 2,5-furandicarboxylic acid; poly(2,5-alkylene furanoate)s; broadband dielectric spectroscopy; molecular dynamics; bio-based polymers
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MDPI and ACS Style

Soccio, M.; Martínez-Tong, D.E.; Guidotti, G.; Robles-Hernández, B.; Munari, A.; Lotti, N.; Alegria, A. Broadband Dielectric Spectroscopy Study of Biobased Poly(alkylene 2,5-furanoate)s’ Molecular Dynamics. Polymers 2020, 12, 1355.

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