Colloid and Polymer Science

, Volume 272, Issue 5, pp 536–541 | Cite as

Morphology and mechanical properties of ultrahigh-molecular-weight polyethylene films prepared from solutions in mixtures of diphenyl and diphenylether as co-solvent

  • T. Ogita
  • T. Ochi
  • Y. -B. Li
  • M. Matsuo
Original Contributions

Abstract

In an attempt to check solvent dependence of drawability of ultra high-molecular-weight polyethylene films, gels were prepared from diphenyl/diphenylether solution, which is well known as Θ-solvent. The content of diphenyl in the mixed solvent was chosen to be 25 wt%. Rapid gelation occurred when the solution had been cooled down to temperature lower than 147°C. The gel shrunk drastically with the further decrease of temperature and formed a bulk specimen. The maximum draw ratio was 20 and the corresponding Young's modulus reached 27 GPa. The value of Young's modulus was higher than the maximum value of melt film stretched up to 30 times, but it was much lower than the value of film which was prepared by gelation from decalin solution and was elongated up to 300. Thus, it turned out that the drastic shrinkage in the process of rapid gelation hampers a suitable level of the entanglement mesh that effectively transmits the drawing force.

Key words

Ultrahigh-molecular-weight polyethylene diphenyl/diphenyl-ether solution mixed solvent rapid gelation Young's modulus 

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Copyright information

© Steinkopff-Verlag 1994

Authors and Affiliations

  • T. Ogita
    • 1
  • T. Ochi
    • 1
  • Y. -B. Li
    • 1
  • M. Matsuo
    • 2
  1. 1.Department of Materials Science and Engineering, Faculty of EngineeringYamagata UniversityYonezawaJapan
  2. 2.Department of Clothing Science, Faculty of Home EconomicsNara Women's UniversityNaraJapan

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