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The current image by Svetlana Viktorovna Kononova, Denis Sapegin, and colleagues represents phase heterogeneity between sulfonated polyimide and poly(amide-imide) polymer phases in the composite film with 7:3 polyimide to poly(amide-imide) weight ratio. Most likely, in this composite, a three-dimensional crystallizing network of polyimide is formed around poly(amide-imide) which is to form an amorphous phase. This assumption was confirmed by the data of the energy-dispersive analysis since it is in the region of the network structure sulfur atoms were detected, which are present in this composite only in the structure of sulfonated polyimide. ARTICLES 48159 Bio-based β-myrcene-modified solution-polymerized styrene-butadiene rubber for improving carbon black dispersion and wet skid resistance

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