Robles-Hernandez, Beatriz; Gonzalez-Burgos, Marina; Pomposo, Jose A.; Colmenero, Juan; Alegria, Angel published the artcile< Glass-transition dynamics of mixtures of linear poly(vinyl methyl ether) with single-chain polymer nanoparticles: evidence of a new type of nanocomposite materials>, Electric Literature of 1592-20-7, the main research area is vinyl polymer chain nanoparticle glass transition dynamic mixture nanocomposite; dielectric relaxation; glass transition; nanocomposites; polymer blends; single-chain polymer nanoparticles.
Single-chain polymer nanoparticles (SCNPs) obtained through chain collapse by intramol. crosslinking are attracting increasing interest as components of all-polymer nanocomposites, among other applications. We present a dielec. relaxation study on the dynamics of mixtures of poly(vinyl Me ether) (PVME) and polystyrene (PS)-based SCNPs with various compositions Analogus dielec. measurements on a miscible blend of PVME with the linear precursor chains of the SCNPs are taken as reference for this study. Both systems present completely different behaviors: While the blend with the linear precursor presents dynamics very similar to that reported for PVME/PS miscible blends, in the PVME/SCNP mixtures there are an appreciable amount of PVME segments that are barely affected by the presence of SCNPs, which nearly vanishes only for mixtures with high SCNP content. Interestingly, in the frame of a simple two-phase system, our findings point towards the existence of a SCNP-rich phase with a constant PVME fraction, regardless of the overall concentration of the mixture Moreover, the dynamics of the PVME segments in this SCNP-rich phase display an extreme dynamic heterogeneity, a signature of constraint effects.
Polymers (Basel, Switzerland) published new progress about Dielectric constant. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, Electric Literature of 1592-20-7.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics