Synthesis, characterization and biodegradability of aliphatic polyesters from cyclic diacetalized galactose
Visualitza/Obre
Report (1,582Mb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2099.1/10711
Tipus de documentProjecte Final de Màster Oficial
Data2010-09
Condicions d'accésAccés restringit per decisió de l'autor
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
The use of carbohydrate derivatives for polymer synthesis has attracted much attention not
only because of the huge abundance and renewable character of these resources, but also
due to the degradable and biocompatible behavior that can be expected for such polymers.
The cyclic monomer dimethyl 2,4:3,5-di-O-methylene galactarate, which was synthesized
from galactaric acid, has several attractive features linked to its rigidity, chirality, non-toxicity
and hydrophilicity.
Aliphatic homopolyesters poly(alkylene 2,4:3,5-di-O-methylene galactarate)s were
prepared from dimethyl 2,4:3,5-di-O-methylene galactarate and the aliphatic α,ω-diols 1,6-
hexanediol; 1,8-octanediol; 1,10-decanediol and 1,12-dodecanediol; and were
characterized by NMR, FT-IR, viscosimetry and GPC. According to the asymmetric
constitution of the galactarate unit, these polyesters displayed optical activity in solution.
The thermal behavior, mechanical properties and biodegradability of these polyesters were
evaluated and compared with those displayed by their homologues dimethyl adipatederived
homopolyesters.
All poly(alkylene 2,4:3,5-di-O-methylene galactarate)s and poly(alkylene adipate)s from
synthesis were semicrystalline. Glass transition temperatures of poly(alkylene 2,4:3,5-di-Omethylene
galactarate)s were higher than those observed for poly(alkylene adipate)s. The
introduction of ring acetal groups improved the thermal stability and caused an increase in
the elastic modulus and the tensile strength of the polyesters, and produced a reduction in
the elongation at break at the same time.
Finally, the degradation study revealed that poly(alkylene 2,4:3,5-di-O-methylene
galactarate)s were biodegradable polyesters, and that they degraded faster than
poly(alkylene adipate)s.
TitulacióMÀSTER UNIVERSITARI EN POLÍMERS I BIOPOLÍMERS (Pla 2009)
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
TFM Cristina Lavilla Aguilar.pdf | Report | 1,582Mb | Accés restringit |