Highly transparent films of new copolyesters derived from terephthalic and 2,4-furandicarboxylic acids


In this study transparent films of poly(ethylene terephthalate)-co-(ethylene 2,4-furandicarboxylate) (PET-co-2,4-PEF) copolymers were developed for the first time, exploring the ability of 2,4-furandicarboxylic acid (2,4-FDCA) to impart excellent optical properties to the polymers thereof. The properties were fine-tuned by feeding this furan monomer content. For example, specifically up to 15 mol% the copolyesters were semi-crystalline in nature, and they were amorphous materials when exceeding the limits of 50 mol% and above. The amorphous polymers had excellent thermal stability over 400 degrees C, in combination with high transmittance at the wavelength of 555 nm.



subject category

Polymer Science


Zaidi, S; Thiyagarajan, S; Bougarech, A; Sebti, F; Abid, S; Majdi, A; Silvestre, AJD; Sousa, AF

our authors


This work was developed within the scope of the ERASMUS + ICM project (Ref. 2017-1-PTO1-KA107-035493) between the University of Sfax and the University of Aveiro and of project CICECO-Aveiro Institute of Materials, FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. The authors wish to thank these institutions for the grant to SZ to cover the expenses of his mobility. The costs resulting from the FCT hiring of AFS were funded by national funds (OE), through FCT - FundacAo para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in numbers 4, 5 and 6 of article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. The authors would also like to acknowledge the financial support of the Ministry of Higher Education and Scientific Research in Tunisia.

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