Early stages of oligomer-polymer diffusion

D. G. Bucknall, J. S. Higgins, S. A. Butler

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We present results of neutron reflectivity measurements of plasticiser diffusion into high molecular weight deuterated poly (methyl methacrylate) (dPMMA). These measurements were made in situ and in real time, enabling the interfacial profile to be studied in detail in situations where the normal 'anneal-quench' procedure is impossible. From the velocity of the diffusion front, the diffusion coefficients for two molecular weights of oligo-methyl methacrylate (OMMA) have been determined. Oligo-poly (ethylene glycol) (PEG) diffusing into dPMMA has also been measured and limited solubility of PEG observed.

Original languageEnglish
Pages (from-to)5473-5483
Number of pages11
JournalChemical Engineering Science
Volume56
Issue number19
DOIs
Publication statusPublished - 8 Oct 2001

Keywords

  • Case II
  • Diffusion
  • Dissolution
  • Interface
  • Oligomers
  • Polymers

ASJC Scopus subject areas

  • Chemical Engineering(all)

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