Facile synthesis of high molecular weight aromatic polyformals containing phthalazinone moiety

Y. Z. Meng, S. C. Tjong, S. J. Wang, A. S. Hay

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    8 Citations (Scopus)

    Abstract

    High molecular weight aromatic polyformals containing phthalazinone moeity were simply synthesized with a high-intensity mixing methodology without the presence of phase-transfer catalyst. Aromatic polyformals can readily be afforded in a very short time and at temperatures ranging from 50 to 140°C. These polyformals showed high glass-transition temperatures together with superior thermal properties when compared with a 4,4′-isopropylidenediphenol (BPA)-type polyformal and polycarbonate. The glass-transition temperatures of these aromatic polyformals ranged from 94 to 229°C. The molecular weights for the polyformals were examined by gel permeation chromatographic technology, and the result showed that the cyclic formation during the condensation could be dramatically reduced at elevated temperature. The molecular weights and solubility increased with an increasing content of bisphenol A in the polyformals. The result demonstrated that the aromatic polyformal with 50% phthalazinone moiety showed the comparable thermal properties with commercial BPA polycarbonate. This method promisingly opened an effective approach to synthesize aromatic polyformals with high molecular weight and without cyclic formations.
    Original languageEnglish
    Pages (from-to)1441-1448
    JournalJournal of Polymer Science, Part A: Polymer Chemistry
    Volume40
    Issue number10
    DOIs
    Publication statusPublished - 15 May 2002

    Research Keywords

    • Macrocyclics
    • Oligomers
    • Polyaromatics

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