JavaScript is disabled for your browser. Some features of this site may not work without it.
El Repositorio Institucional tendrá una ventana de mantenimiento por lo que no estará disponible el viernes 20 de septiembre en un horario de 19:00 a 21:00 hrs
Anomalous temperature dependence of speed of sound of bulk poly(N-isopropylacrylamide) hydrogels near the phase transition
Bulk Poly(N-isopropylacrylamide) (PNIPAm) hydrogels are thermally responsive polymers that undergo a
sharp volumetric phase transition around its lower critical solution temperature of 33 C. The physical
characteristics of bulk, micro-, and nano-form PNIPAm hydrogel have been well-studied, and have
applications ranging from biomedical devices to mechanical actuators. An important physical characteristics
which reveals lack of available information is speed of sound. Prior studies have utilized Brillouin scattering,
multi-echo reflection ultrasound spectroscopy, the sing-around method, and others in measuring
the speed of sound. We use a planar resonant cavity with bulk PNIPAm hydrogel in aqueous solution to
determine the temperature dependent speed of sound around the lower critical solution temperature.
The results show sharp nonmonotonic behavior of the sound velocity in vicinity of the phase transition.
Anomalous temperature dependence of speed of sound of bulk poly(N-isopropylacrylamide) hydrogels near the phase transition
Autor
Walker, Ezekiel
Reyes Contreras, Delfino
Krokhin, Arkadii
Neogi, Arup
Fecha de publicación
2014-02-12
Editor
Ultrasonics
Tipo de documento
Artículo
Palabras clave
Fabry–Pérot resonance
Acoustic cavity
Los documentos depositados en el Repositorio Institucional de la Universidad Autónoma del Estado de México se encuentran a disposición en Acceso Abierto bajo la licencia Creative Commons: Atribución-NoComercial-SinDerivar 4.0 Internacional (CC BY-NC-ND 4.0)