Birefringence in polymers
WebOct 26, 2024 · The present birefringence calculation method is based on the stress-birefringence law and is still difficult in accurate prediction, owing to extremely difficulty … WebMar 24, 2014 · Birefringence is a phenomenon to cause two refracted rays of light when a ray of light enters an optically anisotropic material. The …
Birefringence in polymers
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WebMar 31, 2000 · When birefringence is on the order of the change of the in-plane refractive index between adjacent material layers, surprising and useful optical effects occur. We … WebRelationship between segmental anisotropy in polarizability and stationary ultrasonically induced birefringence in polymer solutions. Journal of Molecular Liquids 2004 , 110 (1-3) , 57-62.
WebJan 1, 2013 · Compensation of orientational birefringence for drawn films of the zero-birefringence polymers was analyzed by the rotating parallel nicols method, and orientation functions for polymer main ... Webdouble refraction, also called birefringence, an optical property in which a single ray of unpolarized light entering an anisotropic medium is split into two rays, each traveling in a …
WebJan 15, 2013 · Birefringence represents the anisotropy of Products, so it is one of hot pot in the field of polymer processing to study the ingredient and variety distribution of birefringence in injection ... WebOriented polyethylene films, in which stacked lamellae grow perpendicular to the flow direction, can show extraordinary wavelength dispersion of birefringence; i.e., birefringence increases with wavelength. Owing to the periodical change of the refractive indices between the crystalline and amorphous layers along the flow direction, with …
WebOct 1, 1985 · Optical birefringence is usually linked to molecular orientation in polymers. Birefringence in materials used for optical applications represents non-isotropic optical …
WebAbstract. A comparison between the efforts which have been made in characterizing flow properties of polymer melts with the aid of mechanical and optical measurements, shows that a lot more interesting work can be done in the latter field. One of the aims of the present compilation is to show how helpful flow birefringence measurements can be ... smart access moneyWebMay 6, 2013 · Either some polymers are still covering some parts of the lipids in a conformation with a positive birefringence, or some polymer did not have enough space to take up its fully extended conformation on the bare surface (see Figure 6). Both scenarios would increase the calculated values of the positively anisotropic areas. hilkes ice freeburg moWebMar 31, 2000 · When birefringence is on the order of the change of the in-plane refractive index between adjacent material layers, surprising and useful optical effects occur. We refer to these effects as giant birefringent optics (GBO). A central feature of GBO is improved control of the reflectivity of p-polarized light. smart access network storageWebRefractive Index of Polymers. The refractive index (n) is an important optical property of polymers and is widely used in material science. The knowledge of the refractive index is crucial in all optical applications of transparent polymers. ... Birefringence. causes double refraction; a ray of light, when entering a birefringent material, is ... smart access platformshilkes ice cuba moWebMay 6, 2013 · Either some polymers are still covering some parts of the lipids in a conformation with a positive birefringence, or some polymer did not have enough … hilkes iceWebFeb 1, 2006 · The major causes of severe birefringence can be divided into two main categories: (1) the difference in the cooling rate inside the polymer when the cooling rate of the polymer melt is increased ... hilkiah edublogs.org