Issue 58, 2017, Issue in Progress

Preparation, characterization and thermal analysis of urea-formaldehyde foam

Abstract

Urea formaldehyde foam (UFF) possesses outstanding properties of fire resistance, low smoke emission, low toxicity, and excellent insulation. These properties make it suitable for thermal insulation in buildings. UFFs were prepared in this work via a foaming technology using hexane as a physical-blowing agent. By the use of varying dosages of hexane, the effect of hexane on the properties of UFF was investigated. Increased hexane dosage was shown to cause an adverse effect on the properties including compression strength, pulverization rate and limiting oxygen index. Foam microstructure was analyzed through scanning electron microscopy (SEM); cell sizes were determined and the mean cell size increased with increasing hexane dosage. This work further investigated the relationship between the physical properties and density of UFF. Furthermore, the pyrolysis behaviour of UFF and the corresponding evolution of gaseous products were examined by using a thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TG-FTIR). Gaseous products during the pyrolysis such as HNCO, NH2CN, HCN, H2O and CO2 were found in the infrared spectra. And possible formation pathways for the main pyrolysis products were tentatively presented. The flammability of UFF was measured by cone calorimetry.

Graphical abstract: Preparation, characterization and thermal analysis of urea-formaldehyde foam

Article information

Article type
Paper
Submitted
30 May 2017
Accepted
17 Jul 2017
First published
21 Jul 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 36223-36230

Preparation, characterization and thermal analysis of urea-formaldehyde foam

W. Yuan, D. Li, Y. Shen, Y. Jiang, Y. Zhang, J. Gu and H. Tan, RSC Adv., 2017, 7, 36223 DOI: 10.1039/C7RA06052A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements