Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 29, Issue 3
Displaying 1-9 of 9 articles from this issue
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Index
Foreword
Technical Notes : Special Issue on Biomimetics
Technical Report
Reports of Meetings and Trade Fair
Original Paper
  • Melt Rheology of Ethylen-tetrafluoroethylene （ETFE）Modified by Divinyl Monomer
    Eiichi Nishi, Takashi Satou, Satoru Imai, Sukumaran Sathish K., Masata ...
    2017 Volume 29 Issue 3 Pages 97-101
    Published: February 20, 2017
    Released on J-STAGE: April 12, 2018
    DOIhttps://doi.org/10.4325/seikeikakou.29.97
    JOURNAL FREE ACCESS
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     We studied the rheological behavior of Ethylen-tetrafluoroethylene（ETFE）modified with divinyl monomer. Since the molecular structure of conventional ETFE is believed to be linear chain, the viscosity under free surface melt-flow is often insufficient for some applications. To improve the processability at various processing operations such as film casting, film blowing and blow molding, an enhancement of elongational viscosity is required due to the low melt strength. The ETFE modified with divinyl monomer showed the outstanding rheological behaviors such as high storage modulus in the low frequency region and strong strain hardening under elongational flow, while standard ETFE indicated the typical behaviors as well as other linear polymers. The enhanced nonlinear elongational behavior with prolonged relaxation time components can be explained by the formation of long-chain branches in modified ETFE.
      We should note that a small amount of divinyl monomer has a strong impact on the melt rheology of ETFE. This is the first paper on an enhancement of melt rheology of ETFE at the best of our knowledge.
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