THE ELASTIC AND PLASTIC MECHANICAL RESPONSES OF MICROCELLULAR FOAMS


OZKUL M. H., MARK J., AUBERT J.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.48, no.5, pp.767-774, 1993 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 5
  • Publication Date: 1993
  • Doi Number: 10.1002/app.1993.070480502
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.767-774
  • Istanbul Technical University Affiliated: Yes

Abstract

Microcellular foams were prepared by the thermally induced phase-separation technique, which yields materials having very small cell dimensions (0.1-20 mum). The polymers employed were isotactic polystyrene, polyacrylonitrile, poly(4-methyl-1-pentene), polyurethane, and Lycra(R) and the resulting foams all had densities in the range 0.04-0.27 g cm-3. Values of Young's modulus and the collapse stress for these foams were measured and compared with predictions for conventional foams containing defects. Also investigated were plastic deformations, some time-dependent behavior, and Poisson's ratio.