Pyrene Lab Report

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We investigated phase behaviors of the mixtures of pyrene and model polymers with or without aromatic side groups. The pyrene and polymer mixtures showed two phase behaviors due to crystallization of pyrene. The melting points of pyrene crystals, which define the phase boundary of the mixtures, were conveniently identified using the DSC technique. Among the polymers employed in this study, poly(2-vinylpyridine) is most favorably miscible with pyrene and 1,4-polyisoprene is least favorable. Using the simple Flory-Huggins theory, we extracted the effective interaction parameters between pyrene and model polymers. The interaction parameters between pyrene and polymers with aromatic side groups are smaller than 0.5, and have favorable enthalphic

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