Van den Berg, Otto; Sengers, Wilco G. F.; Jager, Wolter F.; Picken, Stephen J.; Wuebbenhorst, Michael published the artcile< Dielectric and Fluorescent Probes To Investigate Glass Transition, Melt, and Crystallization in Polyolefins>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is dibutylaminonitrostilbene dielec fluorescent probe polymer glass transition; melt crystallization polyolefin dielec fluorescent probe spectroscopy.
Study of glass transition dynamics in polyolefins by broadband dielec. spectroscopy (DRS) is facilitated by the addition of a dielec. probe, 4,4′-(N,N-dibutylamino)-(E)-nitrostilbene (DBANS), which introduces dipoles, i.e., makes the polymers become dielec. active. For probe concentrations between 0.1% and 1.0% the dielec. strength Δε associated with the dynamic glass transition increases proportionally to the probe concentration for LDPE, isotactic polypropylene, and atactic polystyrene. This result indicates that the probe exhibits no intramol. relaxations, and the probe rotational diffusion effectively senses the microviscosity of the probe environment on the length scale of the segmental dynamics. Temperature-dependent fluorescence spectroscopy on doped polymers shows no changes in fluorescence wavelength around the glass transition temperature Crystallization and melting of the polyolefin matrix results in an increase or decrease of the probe concentration in the amorphous phase, which was clearly detected by real-time fluorescence because the probe emission is sensitive to the probe content, particularly at higher probe concentrations
Macromolecules published new progress about Crystallization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics