On the helical form in syndiotactic poly(methyl methacrylate) thermoreversible gels as revealed by small-angle neutron scattering

Alberto Saiani, Jean Michel Guenet

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The chain trajectory within thermoreversible gels of syndiotactic poly(methyl methacrylate) (sPMMA) has been studied by small-angle neutron scattering in three solvents: chlorobenzene, bromobenzene, and toluene. It is shown that in the investigated scattering domain, the chains are rigid due to their helical conformation. Theoretical fits of the scattering curves are consistent with a double-stranded helical form in which the inner helix adopts a structure already proposed by Kusuyama et al. Just after gel melting, chains take on a new helical conformation which turns out to be more stable in chlorobenzene than in the other two solvents. The reliability of the fitting procedure is also discussed.
    Original languageEnglish
    Pages (from-to)966-972
    Number of pages6
    JournalMacromolecules
    Volume30
    Issue number4
    Publication statusPublished - 24 Feb 1997

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