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We investigated the effect of salt addition on a diblock copolymer system with a negative Flory-Huggins interaction parameter, indicating the two blocks' friendly interactions. SAXS peak discovery in PEO-PMMA is only apparent in PEO-PMMA systems where the volume fraction of the ionic block is less than 10%, according to de la Cruz and coworkers' findings, which guarantees that in PEO-PMMA systems with negative values, only peak phases are observed when the volume fraction of the ionic block is less than 10%.
Source link: https://www.osti.gov/biblio/1842999
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