Flow-induced structure of immiscible polyolefin blends under steady shear flow studied by small angle neutron scattering

Yoshiaki Takahashi, Yoshiaki Ukai, Motohiro Seki, Yushu Matsushita

Research output: Contribution to journalArticle

Abstract

The flow-induced structure of immiscible polyolefin blends under steady shear flow was studied by small angle neutron scattering. The sample used was a 3:7 blend (by weight) of i-polypropylene and ethylene-octene random copolymer. At low shear rates, anisotropic scattering was observed on a two-dimensional detector in through-view measurements (incident beam perpendicular to the flow). The intensity was stronger in the direction perpendicular to the flow direction. In edge-view measurements (incident beam parallel to the flow), no anisotropy was observed. At higher shear rates ( > 50 sec -1 ) , the anisotropy became very weak but the intensity itself became rather strong. A simple explanation of these observations can be given by assuming the existence of string-like domains at low shear rates and their splitting at high shear rates. This idea can be supported by the low interfacial tension between two polyolefins.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalKOBUNSHI RONBUNSHU
Volume62
Issue number1
DOIs
Publication statusPublished - Jan 2005

Fingerprint

neutron scattering
shear flow
Polyolefins
steady flow
Shear flow
Neutron scattering
Shear deformation
Anisotropy
anisotropy
Polypropylenes
ethylene
Surface tension
Ethylene
Copolymers
scattering
Scattering
Detectors
PL 732
rate
Direction compound

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Flow-induced structure of immiscible polyolefin blends under steady shear flow studied by small angle neutron scattering. / Takahashi, Yoshiaki; Ukai, Yoshiaki; Seki, Motohiro; Matsushita, Yushu.

In: KOBUNSHI RONBUNSHU, Vol. 62, No. 1, 01.2005, p. 23-28.

Research output: Contribution to journalArticle

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