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Citació: Lavilla, C. [et al.]. Carbohydrate-based copolyesters made from bicyclic acetalized galactaric acid. "Journal of polymer science. Part A, polymer chemistry", 15 Abril 2012, vol. 50, núm. 8, p. 1591-1604.
Títol: Carbohydrate-based copolyesters made from bicyclic acetalized galactaric acid
Autor: Lavilla Aguilar, Cristina Veure Producció científica UPC; Alla Bedahnane, Abdelilah Veure Producció científica UPC; Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon Veure Producció científica UPC; Benito, Elena; García Martín, Maria de Gracia; Galbis Pérez, Juan Antonio; Muñoz Guerra, Sebastián Veure Producció científica UPC
Data: 15-abr-2012
Tipus de document: Article
Resum: Mixtures of the dimethyl esters of adipic acid and 2,3:4,5-di-O-methylene-galactaric acid (Galx) were made to react in the melt with either 1,6-hexanediol or 1,12-dodecanediol to produce linear polycyclic copolyesters with aldarate unit contents varying from 10 up to 90 mole %. The copolyesters had weight–average molecular weights in the ∼35,000–45,000 g mol−1 range and a random microstructure, and were thermally stable up to nearly 300 °C. They displayed Tg in the -50 to -7 °C range with values largely increasing with the content in galactarate units. All the copolyesters were semicrystalline with Tm between 20 and 90 °C but only those made from 1,12-dodecanediol were able to crystallize from the melt at a crystallization rate that decreased as the contents in the two comonomers approached each other. Copolyesters containing minor amounts of galactarate units adopted the crystal structure characteristic of aliphatic polyesters but a new crystal polymorph was formed when the cyclic sugar units became the majority. Stress–strain parameters were sensitively affected by composition of the copolyesters with the mechanical behavior changing from flexible/ductile to stiff/brittle with the replacement of adipate units by the galactarate units.
ISSN: 0887-624X
URI: http://hdl.handle.net/2117/16184
DOI: 10.1002/pola.25930
Versió de l'editor: http://onlinelibrary.wiley.com/doi/10.1002/pola.25930/abstract
Apareix a les col·leccions:Altres. Enviament des de DRAC
POL - Polímers. Articles de revista
Departament d'Enginyeria Química. Articles de revista
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