Material dispersion decrease

The effects of temperature on the color development of the porous film in chlorobenzene were shown in Table 6 [23]. The coloration was reversible thermochromism. The refractive index of the materials generally decreases as the temperature increases, and the temperature dependence of the liquid is greater than that of the solid. For example, the temperature dependence (A/id/°C) of PVA and chlorobenzene was found to be 3.0 x 10 and 4.5 x 10" at 589.3 nm. Consequently, it is interpreted that the wavelength of the crosspoint between the dispersion curves of PVA and chlorobenzene shifts from the long side to the short side with increasing tem-... 

Note that this simple model predicts the normal dispersion for most optical materials a decrease of the refractive index (real part) on the low energy side of the resonance (absorption band of a polymer for instance) when the frequency of the light is decreased. Due to causality which is the property that the polymer will not respond to the electric held before the held is applied at a given time t, the real part y (cu) and imaginary part of the optical susceptibility are forming a Hilbert... 

It is well known that the dispersion in the optical fibers is divided into three parts, modal dispersion, material dispersion, and waveguide dispersion. In the case of the SI POF, the modal dispersion is so large that the other two dispersions can be approximated to be almost zero. However, the quadratic refractive-index distribution in the GI POF can dramatically decrease the modal dispersion. We have succeeded in controlling the refractive-index profile of the GI POF to be almost a quadratic distribution by the interfacial-gel polymerization technique (2). Therefore, in order to analyze the ultimate bandwidth characteristics of the GI POF in this paper the optimum refractive index profile is investigated by taking into account not only the modal dispersion but also the material dispersion. 

Recently, hydroxyapatite (HA)-PLA composites have been studied by many scientists, since HA particles can reinforce the material and decrease the degradation rate of PLA [63]. HA (Caio(P04)6(OH)2) is an inorganic part of naturally occurring bone. However, due to the lack of adhesion between PLA and HA filler, an improvement of the interfacial adhesion between the particles and the matrix has become the key challenge in preparing HA-PLA composites. Various methods have been developed to modify HA particles to improve adhesion between HA and PLA [64-67]. The modified HA particles were found to be better dispersed in the PLA matrix than unmodified HA particles, and the adhesion between HA particle and PLA matrix was improved. As a result, the modified HA-PLA composites showed better mechanical properties and thermal stability than the unmodified HA/PLA. 

Not all ER suspensions have a linear viscoelasticity region and G and G" don t always decrease with the strain amplitude. Such examples can be found in two similar aluminosilicate particulate materials dispersed in silicone oil systems [83]. Those two particulates have a common molecular formula that can be expressed as (A120j) (67O2), where... 

The calculated maximum bandwidth at p, was dramatically reduced owing to the large material dispersion of PMMA when all types of dispersion were considered. A significant decrease in bandwidth was observed mainly for profile exponents near the value. When the profile exponent deviates greatly from p, material dispersion has little effect on the bandwidth because of the dominant large modal dispersion. 

Molecular swelling, during which the particles of the constituent material swell, their volume grows and the degree of dispersal decreases. 

Resin Viscosity. The flow properties of uncured compounded plastics is affected by the particle loading, shape, and degree of dispersion. Flow decreases with increased sphericity and degree of dispersion, but increases with increased loading. Fillers with active surfaces can provide thixotropy to filled materials by forming internal network stmctures which hold the polymers at low stress. 

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