RT info:eu-repo/semantics/article
T1 PMMA stability under hydrothermal conditions
A1 Fernández Fernández, Ana María
A1 Redondo Hernangómez, Aránzazu
A1 Martín de León, Judit
A1 Cantero Sposetti, Danilo Alberto
K1 Bioquímica
K1 Poly(methyl methacrylate)
K1 Temperature
K1 Water
K1 poli(metilmetacrilato)
K1 Temperatura
K1 Agua
K1 3303 Ingeniería y Tecnología Químicas
AB PMMA is a synthetic polymer of methyl methacrylate. PMMA is used widely in many applications and the interest in their physicochemical properties is growing. In this work, a hydrothermal study was carried out to evaluate the PMMA stability under hydrothermal conditions (up to 200˚C), pH (2 to 10) and reaction time (up to 360 min). The water-PMMA system is affected by different mechanisms when dosed with bases or acids suggesting predominantly an interaction of ester groups with the medium. The results prove that the polymer is highly stable at the tested conditions. It is observed that water molecules are encapsulated in the polymer due to the softening and hardening during the process. This phenomenon was seen in the thermogravimetric analysis. The glass transition temperature of PMMA was slightly reduced after the treatment. This suggests that the hydrothermal process promotes the degradation of the shortest polymeric chains.
PB Elsevier
SN 0896-8446
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/59070
UL https://uvadoc.uva.es/handle/10324/59070
LA eng
NO The Journal of Supercritical Fluids, 2023, vol. 198, 105938
NO Producción Científica
DS UVaDOC
RD 23-nov-2024