TY - JOUR
T1 - A dielectric study on the local dynamics of miscible polymer blends
T2 - Poly(2-chlorostyrene)/poly(vinyl methyl ether)
AU - Urakawa, O.
AU - Fuse, Y.
AU - Hori, H.
AU - Tran-Gong, Q.
AU - Yano, O.
N1 - Funding Information:
We greatly acknowledge the financial support from the Ministry of Education, Science, Sports and Culture, Japan under a Grant-in-aid No.08751047 (to O.U.).
PY - 2001
Y1 - 2001
N2 - Dielectric relaxation of poly(vinyl methyl ether) (PVME)/poly(2-chlorostyrene) (P2CS) blends with a lower critical solution temperature (LCST) was investigated in the one-phase region over a wide range of temperature. Four distinct dielectrically active processes were observed and identified as α1, α2, β and γ relaxation processes. It was found that the β and γ processes were almost unaffected upon varying the blend composition, while their relaxation intensities were approximately proportional to the PVME content. Furthermore, there exist two peaks (α1, α2) corresponding to the segmental relaxation process of each component. By comparing this with the data obtained by small-angle X-ray scattering and differential scanning calorimetry, the experimental results are discussed in terms of dynamical heterogeneity of miscible polymer blends composed of two polymer components with a large difference in glass transition temperatures.
AB - Dielectric relaxation of poly(vinyl methyl ether) (PVME)/poly(2-chlorostyrene) (P2CS) blends with a lower critical solution temperature (LCST) was investigated in the one-phase region over a wide range of temperature. Four distinct dielectrically active processes were observed and identified as α1, α2, β and γ relaxation processes. It was found that the β and γ processes were almost unaffected upon varying the blend composition, while their relaxation intensities were approximately proportional to the PVME content. Furthermore, there exist two peaks (α1, α2) corresponding to the segmental relaxation process of each component. By comparing this with the data obtained by small-angle X-ray scattering and differential scanning calorimetry, the experimental results are discussed in terms of dynamical heterogeneity of miscible polymer blends composed of two polymer components with a large difference in glass transition temperatures.
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U2 - 10.1016/S0032-3861(00)00370-0
DO - 10.1016/S0032-3861(00)00370-0
M3 - Article
AN - SCOPUS:0033775320
SN - 0032-3861
VL - 42
SP - 765
EP - 773
JO - polymer
JF - polymer
IS - 2
ER -