Aging of rigid polyurethane foams: Thermal conductivity of N-2 and cyclopentane gas mixtures
authors Marrucho, IM; Santos, F; Oliveira, NS; Dohrn, R
nationality International
journal JOURNAL OF CELLULAR PLASTICS
author keywords blowing agents; nitrogen; cyclopentane; thermal conductivity; transient hot wire method
keywords HOT-WIRE METHOD; R365MFC
abstract The thermal conductivity of three mixtures of nitrogen and cyclopentane is measured using a transient hot wire method, at temperatures between 315.14 and 395.89 K, and pressures up to 0.53 MPa. These mixtures are important in the evaluation of the evolution of the thermal insulation capacity of closed-cell polyurethane foams considering their aging during the respective applications' total life time. The experimental thermal conductivity data are correlated with the Wassiljewa mixing rules as modified by Mason and Saxena, and predicted using extended corresponding states theory (ECST), with an average absolute deviation of 1.1 and 8.9%, respectively. The increase of the nitrogen fraction in cyclopentane-nitrogen mixtures leads to higher thermal conductivity values than has been predicted by ECST using only pure component thermal conductivity data for all measurements.
publisher SAGE PUBLICATIONS LTD
issn 0021-955X
year published 2005
volume 41
issue 3
beginning page 207
ending page 224
digital object identifier (doi) 10.1177/0021955X05053520
web of science category Chemistry, Applied; Polymer Science
subject category Chemistry; Polymer Science
unique article identifier WOS:000238078400001
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 1.925
5 year journal impact factor 2.064
category normalized journal impact factor percentile 53.94
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg