Microstructure effects on LCST phase behavior of polybutadiene and polyisoprene blends studied by SANs and LS

Shinichi Sakurai, Hiroshi Jinnai, Hirokazu Hasegawa, Takeji Hashimoto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The LCST-type phase behavior was observed for the blend of protonated polyisoprene (HPI) and deuterated polybutadiene (DPB) by small-angle neutron scattering (SANS), time-resolved light scattering (LS), and cloud point measurements. The thermodynamic interaction parameter was determined to evaluate the miscibility by analyzing the SANS scattering profile in a single-phase state. In this paper the microstructure effects of polydienes on the phase diagrams and the miscibility of HPI/DPB blends is discussed. Furtherfore we explain the observed microstructure effects in terms of the random copolymer effect. The effective interaction parameter for the DPB/HPI blends is separated into the fundamental segmental interaction parameters between every pair of 1,2- and 1,4-unit in DPB and 3,4- and 1,4-unit in HPI.

Original languageEnglish
Pages (from-to)147-148
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume31
Issue number2
Publication statusPublished - 1990 Aug 1
Externally publishedYes
EventPapers presented at the Washington, DC Meeting 1990 of the ACS, Division of Polymer Chemistry - Washington, DC, USA
Duration: 1990 Aug 261990 Aug 31

ASJC Scopus subject areas

  • Materials Science(all)
  • Polymers and Plastics
  • Engineering(all)

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