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The development of polymers based on monomers from renewable feedstock, and
more specifically from carbohydrates, is a steadily growing field of interest because of
the properties that can generate these unique structures. They are promising materials
with novel technical possibilities and improved properties, such as biocompatibility and
2,4:3,5-Di-O-methylidene-D-glucitol is a carbohydrate-based diol suitable for the
preparation of linear polycondensates. This compound is readily prepared from Dgluconolactone
by acetalization and subsequent reduction.4The fused bicyclic
dioxolane rings provide rigidity to the molecule making it an interesting candidate for
replacing aromatic rings in conventional aromatic polyesters.
A series of copolyesters made of dimethylterephthalate, 1,6-hexanediol and
2,4:3,5-di-O-methylidene-D-glucitol (PHxGlxyT) with gludioxol contents ranging
between 5 and 32 mol % were synthesized by melt polycondensation and
characterized by NMR and FTIR spectroscopy, GPC and viscosimetry.
The copolyesters had a random microstructure and number-average molecular
weights ranging from 5,000 to 15,000. The influence of the content in gludioxol on the
synthesis results, structure and thermal properties of the novel copolyesters was
comparatively evaluated and discussed.
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