期刊
POLYMER
卷 42, 期 13, 页码 5743-5747出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0032-3861(01)00025-8
关键词
PMMA/SAN blends; dynamic theological behavior; phase separation
On the basis of phase separation temperatures (T-s) for poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends of different compositions, measured by small angle laser light scattering, we have studied dynamic theological behavior of these blends at different temperatures below, near and above T-s. The results showed that the time-temperature superposition principle could be applied and the linear viscoelastic response emerged in the terminal region at temperatures below T-g. However, it was found that the breakdown of time-temperature superposition principle appeared, and viscoelastic response deviated from the linear behavior in the terminal region at temperatures near and above T-g. (C) 2001 Elsevier Science Ltd. All rights reserved.
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