Liquid-crystalline main-chain polymers with a poly(p-phenylene terephthalate) backbone. 1. Synthesis, characterization and rheology of polyesters with alkoxy side chains

S.B. Damman, F.P.M. Mercx, C.M. Kootwijk-Damman

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

    36 Citaten (Scopus)
    123 Downloads (Pure)

    Samenvatting

    The influence of the position and length of alkoxy substituents on the phase behavior of poly(p-phenylene terephthalate)s was investigated by differential scanning calorimetry and rheol. measurements. The 2 polymers with dodecyloxy and hexyloxy side chains on the terephthalate moiety (I and II, resp.) both showed stable liq.-cryst. phases. For these 2 polymers the location of the transition temps. as a function of the mol. wt. (inherent viscosity) leveled off above an inherent viscosity of 2dL g-1. Rheol. measurements indicated that the layered mesophase, shown by II and I, behaves more like a solid than a liq. For the nematic mesophase, only shown by II, a min. in the viscosity-temp. curve was found. The polymer with dodecyloxy substituents on the hydroquinone moiety only shows mesomorphic behavior on cooling, while the polymer with dodecyloxy substituents on both Ph rings does not show any liq.-cryst. behavior. [on SciFinder (R)]
    Originele taal-2Engels
    Pagina's (van-tot)1891-1897
    TijdschriftPolymer
    Volume34
    Nummer van het tijdschrift9
    DOI's
    StatusGepubliceerd - 1993

    Vingerafdruk Duik in de onderzoeksthema's van 'Liquid-crystalline main-chain polymers with a poly(p-phenylene terephthalate) backbone. 1. Synthesis, characterization and rheology of polyesters with alkoxy side chains'. Samen vormen ze een unieke vingerafdruk.

    Citeer dit