Synthesis and characterization of bio-based furanic polyesters

Gopalakrishnan, P.; Narayan-Sarathy, Sridevi; Ghosh, Tamal; Mahajan, Kamal; Belgacem, Mohamed Naceur

doi:10.1007/s10965-013-0340-0

Cited by 58 publications

(49 citation statements)

References 18 publications

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“…A multiple melting process has been previously reported for PEF, as well as for polyethylene terephthalate (PET) . This complex thermal behavior has been ascribed to the melting and recrystallization phenomena and different lamella thickness distributions . The FSC curve (Figure , dashed line) shows T g at 93 °C which is at higher temperatures with respect to DSC analysis as expected due to the faster heating rate employed (10 3 K s −1 for FSC vs either 10 −1 or 1 K s −1 for DSC).…”

Section: Resultsmentioning

confidence: 54%

“…Polymerization of FDCA with bio‐based ethylene glycol (EG), gives a 100% bio‐based polyester . It has been shown that PEF possesses superior barrier properties and more attractive thermal properties (e.g., higher glass transition temperature and lower melting point) than PET . Furthermore, a recent Life Cycle Assessment (LCA) study revealed that PEF production could significantly reduce the nonrenewable energy use and the greenhouse gas emission compared to PET .…”

Section: Introductionmentioning

confidence: 99%

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Nucleation and Self‐Nucleation of Bio‐Based Poly(ethylene 2,5‐furandicarboxylate) Probed by Fast Scanning Calorimetry

Martino

Guigo

Berkel

et al. 2016

Macro Materials & Eng

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The present work focuses on the influence of nucleation processes on the crystallization of bio‐based poly(ethylene 2,5‐furandicarboxylate) (PEF). Nuclei formation has been studied by means of fast scanning calorimetry (FSC) both when cooling from the melt (nonisothermal conditions) and when annealing at either low‐ or high‐temperatures (isothermal conditions). FSC results show that nucleation on cooling can be prevented by using fast rates allowing to keep the polymer in its amorphous state; whereas cooling at moderate rates results in sample nucleation with a subsequent increase of the crystallization rate. Isothermal pretreatment just above the PEF glass transition temperature (Tg) results in nuclei formation whose rate decreases when the nucleation temperature approaches PEF Tg. On the other hand, annealing below the PEF melting point allows determination of the sample self‐nucleation behavior which occurs in a very narrow temperature range, i.e., between 195 and 198 °C.

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Section: Resultsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Nucleation and Self‐Nucleation of Bio‐Based Poly(ethylene 2,5‐furandicarboxylate) Probed by Fast Scanning Calorimetry

Martino

Guigo

Berkel

et al. 2016

Macro Materials & Eng

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“…It is important to note that the structure of the compounds as identified does not agree with linear furan polymers as postulated in the literature (Gopalakrishnan et al 2014;Gandini 2008Gandini , 2011Gandini et al 2008Gandini et al , 2009). Hitherto it was assumed that furfural and other furan derivatives link in a way that furan units are bridged by C 1 links and form relatively flexible systems with extended conjugation that accounts for their color.…”

Section: Structure Of the Hexa-derived Chromophoresmentioning

confidence: 72%

Chromophores from hexeneuronic acids: identification of HexA-derived chromophores

et al. 2017

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Hexeneuronic acids (HexA) have long been known as triggers for discoloration processes in glucuronoxylan-containing cellulosic pulps. They are formed under the conditions of pulping from 4-Omethylglucuronic acid residues, and are removed in an ''A stage'' along the bleaching sequences, which mainly comprises acidic washing treatments. The chemical structures of HexA-derived chromophoric compounds 4-8, which make up 90% of the HexAderived chromophores, are reported here for the first time. The compounds are ladder-type, mixed quinoidaromatic oligomers of the bis(furano)-[1,4]benzoquinone and bis(benzofurano)-[1,4]benzoquinone type. The same chromophoric compounds are generated independently of the starting material, which can be either a) HexA in pulp, b) the HexA model compound methyl 1-13 C-4-deoxy-b-L-threo-hex-4-enopyranosiduronic acid (1) or c) a mixture of the primary degradation intermediates of 1, namely 5-formyl-furancarboxylic acid (2) and 2-furancarboxylic acid (3). Isotopic labeling ( 13 C) in combination with NMR spectroscopy and mass spectrometry served for structure elucidation, and final confirmation was provided by X-ray structure analysis.13 C-Isotopic labeling was also used to establish the formation mechanisms, showing all the compounds to be composed of condensed, but otherwise largely intact, 2-carbonylfuran and 2-carbonylfuran-5-carboxylic acid moieties. These results disprove the frequent assumption that HexA-derived or furfural-derived chromophores are linear furanoid polymers, and might have a direct bearing on structure elucidation studies Chromophores in cellulosic materials. Part XVI.

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“…It is found that the intensity of the C-H stretching peak of ( Fig. 4) In addition, some extra-bands at 1319 cm -1 (twisting vibration of O-H) [25], 1297 cm -1 (C-O-C stretching) [26,27], 1275 cm -1 and 1135 cm -1 (C-O stretching of ester groups) [28][29][30][31][32], and 1225 cm -1 (H-C-C bending and CH 2 twisting) [33,34] appear (Fig. 4).…”

Section: Atr-ftir Analysismentioning

confidence: 97%

Alkali resistance of poly(ethylene terephthalate) (PET) and poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) copolyesters: The role of composition

Chen

Zhang

2015

Polymer Degradation and Stability

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Synthesis and characterization of bio-based furanic polyesters

Cited by 58 publications

References 18 publications

Nucleation and Self‐Nucleation of Bio‐Based Poly(ethylene 2,5‐furandicarboxylate) Probed by Fast Scanning Calorimetry

Nucleation and Self‐Nucleation of Bio‐Based Poly(ethylene 2,5‐furandicarboxylate) Probed by Fast Scanning Calorimetry

Chromophores from hexeneuronic acids: identification of HexA-derived chromophores

Alkali resistance of poly(ethylene terephthalate) (PET) and poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) copolyesters: The role of composition

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