Abstract
Transition phenomena in polymer blends of poly(ethylene oxide) (PEO) and poly(methyl methacrylate) (PMMA) of various compositions were investigated by inverse gas chromatography. Below ca. 15 wt% PEO, the polymer system was almost homogeneous and the transition behavior of the blends was mainly dominated by PMMA. In ca. 25—45 wt% PEO, the two components were completely compatible and the transition behavior of the blends was mainly governed by PEO. In ca. 15—25 wt% PEO, the transition behavior was greatly changed by thermal treatment. This composition range corresponded to a critical state of the above-mentioned two states. Above ca. 45 wt% PEO, PEO domains were segregated in the homogeneous polymer matrix and spread out with increase in PEO content. In the linear triblock copolymers of PEO and PMMA, compatibility was essentially identical to that in the blend, while it greatly depended on the molecular structure in the PEO-grafted block copolymers of PEO and PMMA.
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Murakami, Y. Studies on Compatibility of Poly(ethylene oxide) and Poly(methyl methacrylate) by Inverse Gas Chromatography. Polym J 20, 549–556 (1988). https://doi.org/10.1295/polymj.20.549
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DOI: https://doi.org/10.1295/polymj.20.549