Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 215, Issue 22, Pages 2175-2184Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201400175
Keywords
degradable; 2,5-furandicarboxylic acid; polyesters; poly(lactic acid); renewable resources
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Funding
- FCT/MCTES [BI/UI89/5419/2011, SFRH/BPD/73383/2010]
- PNRC of FCT [PTDC/EQU-EPR/114354/2009, PTDC/QUI-QUI/101058/2008, PEst-C/CTM/LA0011/2013, FCOMP-01-0124-FEDER-037271]
- Fundação para a Ciência e a Tecnologia [PTDC/EQU-EPR/114354/2009, PTDC/QUI-QUI/101058/2008] Funding Source: FCT
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2,5-Furandicarboxylic acid is a promising renewable-based monomer essentially used in polymer synthesis to prepare renewable-based counterparts to petrochemical polyesters. In general, they are entirely based on renewable resources and have a myriad of very interesting thermal and mechanical properties; however, this study is the first to tackle their (bio) degradability, a worldwide-demanded property. To address this demand, an entirely new generation of furandicarboxylate-derived copolyesters, based on both poly(ethylene 2,5-furandicarboxylate) (PEF) and poly(lactic acid) (PLA), is developed for the first time. These copolyesters are characterized by several techniques, including attenuated total reflectance-Fourier transform IR (ATR-FTIR), H-1, and C-13 NMR spectroscopy, thermogravimetric analysis (TGA), DSC, and X-ray diffraction (XRD), and their degradability behavior is evaluated by water-absorption studies and hydrolytic degradation. They are essentially stiff amorphous polymers possessing high T(g)s, e.g., ca. 69 degrees C for 29% of lactyl units. Importantly, the data show also that they have improved degradability when compared with the PEF homopolyester counterpart.
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