Publications by authors named "Darryl S Williams"
Article Synopsis
- The study explores how the surface charge of nucleation agents affects the crystallization behavior of poly(vinylidene fluoride) (PVDF), highlighting that positively charged nucleation agents interact with PVDF’s CF(2) dipoles to significantly enhance crystallization rates.
- Positive nucleation agents also increase the crystallization temperature (lower supercooling) and improve the melting point and crystallinity of PVDF compared to neat PVDF.
- The research indicates that the presence of specific nucleation agents shifts the dominant conformations of PVDF chains from the α phase to γ and β phases.
Electronic absorption and emission spectra are reported for luminescent d(0) monoimido group 5 compounds M(NR)Cl(3)L(2) (M = Nb, Ta; R = alkyl, aryl; L = dme, Cl(-), py). These compounds display weak (epsilon < 200 M(-)(1) cm(-)(1)), well-resolved lowest-energy transitions in the high-energy visible and near-UV regions (20 000 < E(abs) < 29 000 cm(-)(1)). The energy of this absorption band depends strongly on the nature of the imido substituent, with a significant decrease observed when aryl groups are present.
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