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Biodegradable Copolyesters of Poly(hexamethylene terephthalate) Containing Bicyclic 2,4:3,5‐Di‐ O ‐methylene‐ d ‐Glucarate Units
Author(s) -
Japu Cristina,
de Ilarduya Antxon Martínez,
Alla Abdelilah,
GarcíaMartín M. Gracia,
Galbis Juan A.,
MuñozGuerra Sebastián
Publication year - 2014
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201400299
Subject(s) - hydrolysis , polymer chemistry , condensation polymer , crystallinity , methylene , dimethyl terephthalate , materials science , amorphous solid , polyester , chemistry , polymer , organic chemistry , composite material
A set of copolyesters (PHT x Glux y ) with compositions ranging between 90/10 and 50/50 in addition to the parent homopolyesters poly(hexamethylene terephthalate) (PHT) and PHGlux, are prepared by the melt polycondensation of 1,6‐hexanediol (HD) with mixtures of dimethyl terephthalate (DMT) and dimethyl 2,4:3,5‐di‐ O ‐methylene‐ d ‐glucarate (Glux). The copolyesters haveM ¯ win the 35 000–45 000 g mol −1 range, their microstructure is random, and they start to decompose at a temperature well above 300 °C. Crystallinity of PHT is repressed by copolymerization so that copolyesters containing more than 20% of sugar‐based units are essentially amorphous. On the contrary, PHT x Glux y displays a T g that increases monotonically with composition from 16 °C in PHT up to 73 °C in PHGlux. Compared with PHT, the copolyesters show an accentuated susceptibility to hydrolysis and are sensitive to the action of lipases upon incubation under physiological conditions. The degradability of PHT x Glux y increases with the content in Glux units.