INVESTIGADORES
ALVAREZ Vera Alejandra
artículos
Título:
Development of potentially biocompatible hydrogels with cylindrical pores prepared from polyvinyl alcohol and low‐molecular weight polyacrylic acid
Autor/es:
SANCHEZ, LAURA M.; ALVAREZ, VERA A.
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Año: 2019 vol. 59 p. 1479 - 1488
ISSN:
0032-3888
Resumen:
In the present work, blend hydrogels from PVA and two different low PAA molecular weights, Mw 1800 g/mol and 5000 g/mol were prepared through the freezing-thawing (F-T) physical crosslinking method. The obtained materials were fully characterized by means of scanning electronmicroscopy (SEM) in order to analyze their morphology, gel fraction (GF) to determine the crosslinking degree and Fourier transformed infrared spectroscopy (FTIR) to analyzethe PVA-PAA interactions. Thermal characterizations [thermogravimetric analysis (TGA) and dynamic scanning calorimetry (DSC)] were conducted to study the relevant thermal characteristics. Sorption tests at different pH values (4 and 7) obtained from different aqueous systems were also inquired.The effects of PAA contents (between 1 and 5 wt%) and Mw of the used PAA on the hydrogel final properties were analyzed and related to the most probably PVA-PAA interactions.