Circular birefringence of banded spherulites
WebCircular Birefringence of Banded Spherulites Xiaoyan Cui,†Alexander G. Shtukenberg,*, †John Freudenthal,†Shane Nichols,†Bart Kahr*† †Department of Chemistry, New York … WebThere are two types of spherulites grown from the melt at high temperature (up to 60 °C). The most common is a spherulite from the nonpolar phase (α form), which is larger and has high birefringence and tightly spaced concentric bonding. The second type is smaller and has less birefringence, and comes from the γ phase.
Circular birefringence of banded spherulites
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WebOct 1, 2015 · There are many other types of “bands” in crystallized spherulites – including “radial stripes” with alternate birefringence colors as bands – periodic bands – because … WebSep 7, 2011 · The circular birefringence of polycrystalline polymers is invariably obscured by strong linear birefringence. To parse the two mechanisms of light retardation, …
WebCircular birefringence of banded spherulites. X Cui, AG Shtukenberg, J Freudenthal, S Nichols, B Kahr. Journal of the American Chemical Society 136 (14), 5481-5490, 2014. 51: ... Growth ordering and anomalous birefringence in ugrandite garnets. AG Shtukenberg, DY Popov, YO Punin. Mineralogical Magazine 69 (4), 537-550, 2005. 44: WebCircular birefringence of banded spherulites. X Cui, AG Shtukenberg, J Freudenthal, S Nichols, B Kahr. Journal of the American Chemical Society 136 (14), 5481-5490, 2014. 51: 2014: Complete polarimetry on the asymmetric …
WebMar 13, 2014 · Circular birefringence (CB) has recently been used to interrogate banded spherulites. Cui et al. [45] observe that CB oscillates along the radius, 90 • out of phase … WebSep 23, 2024 · A novel 3D growth mechanism of ring-banded spherulite is proposed. 2. Experimental 2.1. Materials and Preparation PBA and PEO were dissolved into chloroform and made into a 2 wt.% polymer solution. PBA was purchased from Aldrich Chemical Company, Inc. (St. Louis, MO, USA), with M w = 12,000 g/mol, T g = −66.2 °C, and T m …
WebNov 7, 2024 · Substrates partially covered with F10H16 contain incomplete ring-banded spherulites and smaller objects in which lamellae and circular nanodomains co-exist. …
WebJan 31, 2024 · Crystal assembly by crystallization and self-aggregation into periodicity, viewed as circular ring bands in optical birefringence patterns, in the family of aliphatic polyesters is surveyed. The periodic packing in all polyesters shares similarity of grating architectures in interiors and banding on top surfaces. highest wbc countWebDec 7, 1999 · We discuss and evaluate methods for determining handedness of twisting, particularly in tightly banded spherulites, and illustrate them by application to poly(3 … highest webWebBanded spherulites of PEA, PBS and their PBS–PEA blends were studied by optical and atomic force microscopies. It was found that PEA forms a regular banded structure … highest waves on the great lakesWebMar 17, 2024 · Banded spherulitic growth of crystal is observed in some materials with spherically symmetric growth front and periodic radial variation of birefringence. This … highest wavelength waveWebThe circular birefringence is shown to be a consequence of misoriented, overlapping anisotropic lamellae, a kind of optical activity associated with the mesoscale … highest waves on lake superiorWebJul 18, 2016 · Ring-banded PLLA spherulites may be seen when melt-crystallized at 125~140 °C. However, at same Tc, ringless PLLA spherulites are resulted when the samples are subjected to cold … highest webcam fpsWebMar 6, 2013 · Mueller matrix imaging reveals radial oscillations in not only linear birefringence, but also circular birefringence, whose origin is explained through slight (∼1.3°) but systematic splaying... highest website traffic