Phase separation in deuterated polycarbonate/poly(methylmethacrylate) blend near glass transition temperature

M. Motowoka, H. Jinnai, T. Hashimoto, Y. Qiu, C. C. Han

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Early stage of spinodal decomposition kinetics of deuterated polycarbonate/ poly(methylmethacrylate) blend has been studied by the time resolved small angle neutron scattering measurements. A trapped miscible state was obtained through fast solution casting of film specimens. Time dependence of the structure factor, S(q,t), was measured after the specimen temperature was quickly increased to a final temperature which is above its glass transition temperature, Tg. Thus, the early stage of spinodal decomposition kinetics has been observed starting from the dimension (q-1) comparable to the single chain radius of gyration, Rg, for a binary polymer mixture. The results provide an unequivocal quantitative measure of the virtual structure factor, S(q,∞); the relationship of qm and qc through rate of growth, Cahn-plot analysis, and singularity in S(q,∞); the growth of fluctuation of qRg < 1 and intra-chain relaxation of qRg > 1; and also a clear proof of the Cahn-Hillard-Cook theory in the early stage of spinodal decomposition of a mean-field system.

Original languageEnglish
Pages (from-to)2095-2100
Number of pages6
JournalJournal of Chemical Physics
Volume99
Issue number3
DOIs
Publication statusPublished - 1993 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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