Dynamic Mechanical Analysis during polyurethane foaming: Relationship between modulus build-up and reaction kinetics

Autor: Paula Cimavilla-Román, Mercedes Santiago-Calvo, Miguel Ángel Rodríguez-Pérez

Publikováno v: Polymer Testing, Vol 103, Iss , Pp 107336- (2021)

The modulus build-up and relative density evolution during the reactive foaming of four standard polyurethane formulations was monitored in-situ by Dynamic Mechanical Analysis (DMA) with a customised set-up in parallel plate geometry. The modulus inc

Externí odkaz: https://doaj.org/article/48c859f1b3c8495f940e7ef1796fe7ea

Role of Air Bubble Inclusion on Polyurethane Reaction Kinetics

Autor: Ernesto Di Maio, Mercedes Santiago-Calvo, Cosimo Brondi, MIGUEL ANGEL RODRIGUEZ PEREZ

Publikováno v: Materials; Volume 15; Issue 9; Pages: 3135

In this study, we investigated the influence of mixing conditions on the foaming process of water blown polyurethane (PU) foams obtained at different mixing speeds (50, 500, 1000 and 2000 rpm). In particular, the morphological evolution during the fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc013ce684bd7e3d651767d81537919c
https://hdl.handle.net/11588/901253

X-ray radioscopy validation of a polyol functionalized with graphene oxide for producing rigid polyurethane foams with improved cellular structures

Autor: Rodrigo París, Fernando Villafañe, Victoria Blasco, Saul Pérez-Tamarit, Mercedes Santiago-Calvo, Miguel Angel Rodriguez-Perez, Paula Cimavilla-Román, Carolina Ruiz

Publikováno v: UVaDOC. Repositorio Documental de la Universidad de Valladolid
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Producción Científica
Fillers can be dispersed in polyurethane (PU) components to produce PU foams with improved properties by different methods. Herein, graphene oxide (GO) is chemically linked to polyol chains in order to suppress fillers ag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84ea2e7d7671024cdd29de91ff470762
https://doi.org/10.1016/j.eurpolymj.2019.06.012

Evaluation of the thermal conductivity and mechanical properties of water blown polyurethane rigid foams reinforced with carbon nanofibers

Autor: J.L. Ruiz-Herrero, Josías Tirado-Mediavilla, Fernando Villafañe, Miguel Angel Rodriguez-Perez, Lars Rosgaard Jensen, Mercedes Santiago-Calvo, Jens Chr. M. Rauhe

Publikováno v: Santiago-Calvo, M, Tirado-Mediavilla, J, Rauhe, J C, Jensen, L R, Ruiz-Herrero, J L, Villafañe, F & Rodríguez-Pérez, M Á 2018, ' Evaluation of the thermal conductivity and mechanical properties of water blown polyurethane rigid foams reinforced with carbon nanofibers ', European Polymer Journal, vol. 108, no. November 2018, pp. 98-106 . https://doi.org/10.1016/j.eurpolymj.2018.08.051

This article studies the effect of carbon nanofibers (CNFs) on the morphological, thermal and mechanical properties of water-blown rigid polyurethane (PUR) foams with densities in the range of 55–60 kg/m 3. Different amounts of CNF have been used,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::758f9eed64ede93d743a4299d72a9e77
https://doi.org/10.1016/j.eurpolymj.2018.08.051

Infrared expandometry: A novel methodology to monitor the expansion kinetics of cellular materials produced with exothermic foaming mechanisms

Autor: Saul Pérez-Tamarit, Mercedes Santiago-Calvo, Fernando Villafañe, Miguel Angel Rodriguez-Perez, Josías Tirado-Mediavilla

Publikováno v: Polymer Testing. 66:383-393

This paper presents a new methodology called “Infrared Expandometry” appropriate to characterize simultaneously the expansion kinetics (height vs. time and volume vs. time) and the temperature evolution of cellular materials by using the infrared

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d786a7a2d3a729df5047844153bbff9
https://doi.org/10.1016/j.polymertesting.2018.02.004