Mechanical hole burning spectroscopy in the vicinity of the ODT for an SIS block copolymer

Qian Qin, Gregory B. McKenna, Xiangfu Shi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We describe results for experiments in which a novel rheological technique is applied to a styrene-isoprene-styrene triblock copolymer in the vicinity of the order-disorder transition. Mechanical Hole Burning Spectroscopy (MSHB) was developed to probe dynamic heterogeneity in polymers. In this technique, a large amplitude oscillatory strain (LAOS) is imposed on a sample as a perturbation, and is followed by a small step strain. The relaxation response is then compared with that without the LAOS perturbation. It has been assumed that mechanical holes for heterogeneous systems. For homogeneous systems no hole would result. Here the heterogeneity of a tri-block copolymer was investigated in the vicinity of its order-disorder transition and it was found that the mechanical hole intensity gradually decreases as the phase boundary is approached from the ordered regime. At the one-phase or the disordered region, no apparent holes were observed.

Original languageEnglish
Title of host publicationSociety of Plastics Engineers Annual Technical Conference
Subtitle of host publicationPlastics Encounter at ANTEC 2007, Conference Proceedings
Pages1761-1765
Number of pages5
StatePublished - 2007
EventSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007 - Cincinnati, OH, United States
Duration: May 6 2007May 11 2007

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings
Volume3

Conference

ConferenceSociety of Plastics Engineers Annual Technical Conference: Plastics Encounter at ANTEC 2007
Country/TerritoryUnited States
CityCincinnati, OH
Period05/6/0705/11/07

Keywords

  • Block copolymer
  • Heterogeneity
  • Mechanical hole burning spectroscopy
  • Order-disorder transition
  • Rheology

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