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Bio-based poly(hexamethylene terephthalate) copolyesters containing cyclic acetalized tartrate units

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10.1016/j.polymer.2013.01.013
 
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hdl:2117/18362

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Japu, Cristina
Martínez de Ilarduya Sáez de Asteasu, Domingo AntxonMés informacióMés informacióMés informació
Alla Bedahnane, AbdelilahMés informacióMés informacióMés informació
Muñoz Guerra, SebastiánMés informacióMés informació
Document typeArticle
Defense date2013-03-08
PublisherElsevier
Rights accessRestricted access - publisher's policy
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
A cyclic acetal of dimethyl l-tartrate (dimethyl 2,3-di-O-methylene l-threarate, Thx) was used as comonomer of dimethyl terephthalate (DMT) in the polycondensation with 1,6-hexanediol (HD) in the melt. Random copolyesters PHTxThxy with contents in tartrate units up to 50% were obtained with satisfactory molecular weights (Mw between 20,000 and 50,000) and dispersities slightly above 2, and without apparent discoloration. The copolyesters started to decompose above 300 °C. The Tg of the copolyesters oscillated between +9 and −9 °C with values steadily decreasing with increasing contents in Thx units. All the copolyesters as well as the homopolyester entirely made of tartrate units were semicrystalline with Tm falling from ∼145 °C for PHT to ∼70 °C for PHThx with intermediate values decreasing as the content in Thx increased. Copolyesters containing up to 30% of tartrate units were able to crystallize from the melt at crystallization rates that were delayed by the presence of tartrate units. The PHT70Thx30 copolyester displayed significant hydrodegradability when incubated in aqueous buffer and also certain biodegradability when subjected to the action of porcine pancreas lipases.
CitationJapu, C. [et al.]. Bio-based poly(hexamethylene terephthalate) copolyesters containing cyclic acetalized tartrate units. "Polymer", 08 Març 2013, vol. 54, núm. 6, p. 1573-1582. 
URIhttp://hdl.handle.net/2117/18362
DOI10.1016/j.polymer.2013.01.013
ISSN0032-3861
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S0032386113000360
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  • POL - Polímers Industrials Avançats i Biopolímers Tecnològics - Articles de revista [107]
  • Departament d'Enginyeria Química - Articles de revista [2.024]
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