Optical properties transparency

Optical properties Transparent, pale colours available. ... 

Optical properties Transparent but not as glass-clear as acrylics or polyesters. ... 

Due to the centrosymmetric cubic crystalline structure, its optical properties are isotropic. Owing to its high thermal stability, stable chemical properties, and unique homogenous optical properties, transparent YAG ceramics are not only an important high-temperature structural material, but also an excellent host material for... 

Figure 2 shows the details of Suwc olymer bar chat in Figure 1. They are classified into fluOTopolymo incorpOTating fluorine at their backbones and side-chains. The main-chain-fluorinated polymers have die good optical property transparent than side-chain-fluorinated polymers. Some fluoropolymers have the good absorption coefficient less than 1 pm, which can not be achieved by fluorination at side-chains. Tetrafluoroethylene (TFE) is one of good monomers for backbone-flucainated polymers. Figure 3 shows the TFE-contoit dependence of absorption coefficient of TFE-nwb( Tiene (NB) cqiolymers. The more TFE-content ino eases, the more transparent the copolymer becomes. Note diat die TFE polymers have the potential of the absorption coefficient less than 1 pm. ...

Transparency Only contact transparency. Consider using PS, PMMA, TPX or PC if transparency is critical. PP random copolymers have better transparency. Nucleating agents further improve clarity. Material from different suppliers may have different optical properties. Transparency depends on the processing conditions and crystallisation as well. 

The important properties ofhydrophobic sihca aerogels will be described in this section. Especially, we describe silica aerogers inihal properties and its resistance to moisture for optical properties, transparency and refractive index. 

Optical Properties and Radiation Effects. Within the range of wavelengths measured (uv, visible, and near-ir radiation), Teflon PFA fluorocarbon film transmits slightly less energy than FEP film (29) (Table 6). In thin sections, the resin is colorless and transparent in thicker sections, it becomes translucent. It is highly transparent to it radiation uv absorption is low in thin sections. Weather-O-Meter tests indicate unlimited outdoor life. 

Finally, the nature of the crystalline microstmcture, ie, crystal size and morphology and the textural relationship among the crystals and glass, is the key to many mechanical and optical properties, including transparency/opacity, strength and fracture toughness, and machinabiUty. These microstmctures can be quite complex and often are distinct from conventional ceramic microstmctures (6). 

Optical Properties. Owing to the high crystallinity of HDPE, most thick-waHed articles made from HDPE resins are opaque. Significant surface roughness can also add to the opacity. Thin HDPE film, in contrast, is translucent, but its transparency is significantly lower than that of LDPE or LLDPE film. The ultraviolet transmission limit of HDPE is around 230 nm. 

Optical Properties. Haze is the most common optical property problem that depends on colorants. Because dyes ate dissolved into the resin system, they contribute Htde or no practical haze to the system. Pigments can have significant haze, which is a combination of the pigment itself and the quahty of dispersion of the pigment. In an opaque appHcation haze is not a concern, but in transparent or translucent appHcations haze development becomes an important criterion in colorant evaluation. 

Optics Electrochromic displays, optical filters (windows with adjustable transparency), materials with non-linear optical properties... 

Optical Properties. The optical properties of a plastic which are important are refraction, transparency, gloss and light transfer. The reader is referred to BS 4618 1972 for precise details on these terms. Table 1.9 gives data on the optical properties of a selection of plastics. Some plastics may be optically clear (e.g. acrylic, cellulosics and ionomers) whereas others may be made transparent. These include epoxy, polycarbonate, polyethylene, polypropylene, polystyrene, polysulphone and PVC. 

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