ISSN:
1089-7690
Quelle:
AIP Digital Archive
Thema:
Physik
,
Chemie und Pharmazie
Notizen:
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 intrachain relaxation of qRg(approximately-greater-than)1; and also a clear proof of the Cahn–Hillard–Cook theory in the early stage of spinodal decomposition of a mean-field system.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.465275
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