Dynamic light scattering study on a bimodal end-linked polydimethylsiloxane network structure

Hidetoshi Oikawa

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The cooperative diffusion coefficient Dcoop and the normalized variance μ2 \ ̄qG-2 for bimodal end-linked polydimethylsiloxane (PDMS) networks were determined by means of dynamic light scattering (DLS) measurements. Dcoop was proportional to polymer weight concentration at the equilibrium state of swelling Ce to the power of 0.88, which was larger than the theoretical exponent, compared with the unimodal PDMS networks. Further, the value of μ2 \ ̄qG-2 at the lowest Ce was greater than that of the corresponding bimodal PDMS solutions in the semidilute regime, and the autocorrelation function of DLS could be reproduced by a double-exponential fitting. These facts suggested a spatially and compositionally heterogeneous structure of bimodal PDMS networks, especially in the case of the lowest Ce.

Original languageEnglish
Pages (from-to)1116-1119
Number of pages4
JournalPolymer
Volume33
Issue number5
DOIs
Publication statusPublished - 1992

Keywords

  • bimodal network
  • dynamic light scattering
  • polydimethylsiloxane

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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