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Title:	Solid-state modification of PBT with cyclic acetalized galactitol and D-mannitol: Influence of composition and chemical microstructure on thermal properties
Author:	Lavilla Aguilar, Cristina; Gubbels, Erik; Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon; Noordover, Bart A. J.; Koning, Cor E.; Muñoz Guerra, Sebastián
Other authors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. POL - Polímers Industrials Avançats i Biopolímers Tecnològics
Abstract:	Two bicyclic carbohydrate-based diols, 2,3:4,5- di- O -methylene-galactitol (Galx) or 2,4:3,5-di- O -methylene- D - mannitol (Manx), were introduced into the backbone of poly(butylene terephthalate) using the solid-state modi fi cation technique (SSM). The resulting copolyesters had a unique block-like chemical microstructure that endows them with superior thermal properties when compared with their random counterparts obtained by melt copolymerization. The materials prepared by SSM displayed higher melting points, crystal- lization temperatures, and crystallinity due to the presence of long PBT sequences in the copolyester. The glass-transition temperatures also increased upon incorporation of the bicyclic comonomers, this e ff ect being more pronounced for Manx units. The melting points of these block-like copolyesters decreased after melting due to the occurrence of randomization, but they remained higher than those of copolyesters prepared from the melt. SSM was demonstrated to be a very suitable technique for the incorporation of rigid monomers into the amorphous phase of PBT, leading to bio-based non-random copolyesters with remarkable thermal properties
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria química -Polymers -solid state modification -PBT -Galactitol -D-Manitol -Polímers
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
Published by:	American Chemical Society (ACS)
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