From Fossil Resources to Renewable Resources: Synthesis, Structure, Properties and Comparison of Terephthalic Acid-2,5-Furandicarboxylic Acid-Diol Copolyesters
Novel copolyesters were successfully synthesized from terephthalic acid (TPA), 2,5-furandicarboxylic acid (FDCA) and ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol and 1,8-octanediol via direct esterifi cation method by using tetrabutyl titanate (TBT) as catalyst. The copolyesters were characterized by nuclear magnetic resonance spectroscopy (1H-NMR), gel permeation chromatography (GPC), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and tensile tests. The results of GPC showed that all of the copolyesters had high molecular weight, with an average molecular weight (Mw) more than 1×104 g/mol. The results of 1H-NMR showed that the copolyesters were random copolymers which compositions were well controlled by the feed ratio of the diacid monomers, and the degrees of randomness (B) values were near to 1.0 and 1.40. The results of DSC showed that all of the copolyesters had one glass transition temperature (Tg) and the Tgs were between those of corresponding homopolyesters. The results of TGA showed that the copolyesters were thermally stable up to 370°C and had similar thermal stabilities to corresponding homopolyesters. The results of tensile tests showed that some of the PETF and PTTF copolyesters had better tensile strength and tensile modules, and PBTF, PHTF and POTF copolyesters had higher elongation at break.
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Document Type: Research Article
Publication date: 2015-05-01
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- The Journal of Renewable Materials (JRM) publishes high quality peer reviewed original research on macromolecules and additives obtained from renewable/biobased resources. Utilizing a multidisciplinary approach, JRM introduces cutting-edge research on biobased monomers, polymers, additives (both organic and inorganic), their blends and composites. It showcases both fundamental aspects and new applications for renewable materials. The fundamental theories and topics pertain to chemistry of biobased monomers, macromoners and polymers, their structure-property relationship, processing using sustainable methods, characterization (spectroscopic, morphological, thermal, mechanical, and rheological), bio and environmental degradation, and life cycle analysis. Demonstration of use of renewable materials and composites in applications including adhesives, bio and environmentally degradable structures, biomedicine, construction, electrical & electronics, mechanical, mendable and self-healing systems, optics, packaging, recycling, shape-memory, and stimulus responsive systems will be presented.
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