Pattern formation in a bi-soft segment urethane elastomer

Ana C. Trindade, M. H. Godinho, Marcelo Luiz Simões, J. L. Figueirinhas

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.

Original languageEnglish
Pages (from-to)93/[1703]-101/[1711]
JournalMolecular Crystals and Liquid Crystals
Volume412
DOIs
Publication statusPublished - 2004
Event19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom
Duration: 30 Jun 20025 Jul 2002

Keywords

  • Liquid crystalline elastomers
  • Pattern formation
  • Urethane/urea elastomers

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