Topic
Miscibility
About: Miscibility is a research topic. Over the lifetime, 5521 publications have been published within this topic receiving 133547 citations. The topic is also known as: miscible.
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TL;DR: In this paper, the shape of glass transition temperature (Tg)-composition curve of the miscible blend system changes from concave to S-shaped and to convex with increasing carboxylic acid content of the copolymer.
43 citations
43 citations
TL;DR: In this paper, a triple-resonance 1H,19F,13C solid-state CPMAS NMR was used to examine the miscibility of isotactic, syndiotactic, or atactic PMMA with poly(vinylidene fluoride) (I).
Abstract: Triple-resonance 1H,19F,13C solid-state CPMAS NMR was used to examine the miscibility of isotactic, syndiotactic, or atactic PMMA with poly(vinylidene fluoride) (I). From the fluorine-to-carbon cross-polarization expts., the av. distance between F and OCH3 carbons in intimately mixed I and PMMA was estd. Exptl. evidence for a specific interaction between I and PMMA segments was presented. The proton-to-fluorine cross-depolarization expts. yielded information on size and compn. of the mixed PMMA/I phase. The fraction of nonmixed PMMA was detd. for these blends, and this fraction was smaller for isotactic than for atactic and syndiotactic PMMA. Large differences in the amts. of isolated PMMA were obsd. between melt-mixed and copptd. blends.
43 citations
TL;DR: In this paper, the scale dependence of polylactide and polyhydroxybutyrate (PHB) miscibility was investigated by the microsecond atomistic molecular dynamics simulations for the first time and the model and the simulation protocol were confirmed through comparison of the glass transition temperature (Tg) with experimental data.
Abstract: Miscibility of polylactide (PLA) and polyhydroxybutyrate (PHB) is studied by the microsecond atomistic molecular dynamics (MD) simulations for the first time. The model and the simulation protocol were confirmed through comparison of the glass transition temperature (Tg) with experimental data. It was established that PLA and PHB are miscible on the basis of the Flory–Huggins theory. Analysis of the mobilities of PLA and PHB subchains revealed that the blends have two transitions to a glassy state at the length scale of a few Kuhn segments, which is in line with the predictions of the self-concentration model. At the same time at the larger length scale a single transition to a glassy state was observed, suggesting scale dependence of PLA and PHB miscibility. This scale dependence was confirmed through the evaluation of the interchain pair correlation functions.
43 citations
TL;DR: The phase boundaries of untreated silica-filled and unfilled poly(methyl methacrylate) (PMMA)/poly(styrene- stat -acrylonitrile) (SAN) blends were determined by dynamic shear rheology as mentioned in this paper.
43 citations