Properties of rigid polyurethane foams blown by HCFC 141B and distilled water

H. C. Jung, S. C. Ryu, W. N. Kim, Y. B. Lee, K. H. Choe, S. B. Kim

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Rigid polyurethane foams (PUFs) were prepared from polymeric 4,4′-diphenylmethane diisocyanate, polyester polyol, 1,4-butane diol, silicone surfactant, hydrochlorofluorocarbon (HCFC) 141B, and distilled water. The properties and structure of the PUFs were investigated with differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and a universal testing machine. The density of the PUF blown by distilled water and/or HCFC 141B decreased from 175.7 to 28.2 kg/m3 with an increase of blowing agents. From the SEM results, the average cell size of the PUF blown by distilled water and/or HCFC 141B decreased from 175.7 to 28.2 kg/m3 with an increase of blowing agents. From the SEM results, the average cell size of the PUF blown by distilled water increased from 150 to 290 μm with the distilled water content. From the DSC results, the glass-transition temperature (Tg) of the PUF blown by distilled water increased from 85.7 to 101.7°C with increasing distilled water content, whereas the Tg of the PUF blown by HCFC 141B remained unchanged with HCFC 141B content. The compressive strength and modulus of the PUF blown by a mixture of distilled water and HCFC 141B was increased from 0.13 to 0.25 MPa and from 3.00 to 7.23 MPa, respectively, with the distilled water content at the sample density of about 44.0 kg/m3. The increase of the compressive strength and modulus of the PUF at the same density was related to the increase of the Tg from 86.0 to 100.9°C.

Original languageEnglish
Pages (from-to)486-493
Number of pages8
JournalJournal of Applied Polymer Science
Volume81
Issue number2
DOIs
Publication statusPublished - 2001 Jul 11

Keywords

  • Cellular materials
  • Compressive strength
  • Density
  • Glass-transition temperature
  • Rigid polyurethane foam

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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