Title:
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Sulfonated poly(hexamethylene terephthalate) copolyesters: enhanced thermal and mechanical properties
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Author:
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Bautista Betancur, Mayka Irina; Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon; Alla Bedahnane, Abdelilah; Muñoz Guerra, Sebastián
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. POL - Polímers Industrials Avançats i Biopolímers Tecnològics |
Abstract:
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A series of poly(hexamethylene terephthalate-
co
-hexamethylene 5-sodium sulfoisophthalate) copolyesters containing from
5 to 50 mol % of sulfonated units as well as the two parent homopolymers are prepared by melt polycondensation. The polyesters
are obtained with high molecular weights, which decrease with the increased content of sulfonated units in the copolymer. Polyesters
with 5 and 10 mol % of sulfonated units are semicrystalline whereas for contents equal or above 20 mol % they are unable to crystal-
lize from the melt. Thermogravimetric analysis show that the thermal stability decreases with the content in sulfonated units. Isother-
mal crystallizations of semicrystalline copolyesters show that the insertion of the sulfonated units causes a reduction of crystallizabil-
ity, most probably due to the occurrence of ionic aggregations. It is observed a synergistic effect on the mechanical properties for
copolymers with contents of around 5 mol % where the elongation at break increases drastically. Moreover, the hydrolytic degrada-
tion of the copolymer is enhanced with the content in sulfonated units |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria química -Polyesters -Sulfonated polyesters -polyelectrolytes -properties -ionomers. -Polièsters |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
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