Light diffusing polycarbonate—polycycloolefin blends

Marek, M.; Steidl, Josef

doi:10.1007/s10853-006-5230-y

Cited by 12 publications

(5 citation statements)

References 1 publication

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“…Optical diffusers are used in lighting bodies, luminaries, illuminated signs, automotive dashboards and decoration plates. 13 Another important application is in liquid crystal displays, where diffusing elements are used for achieving improved uniformity in the brightness of the display. Two distinct types of optical diffuser screens are recognized, namely, surface-relief and volumetric type.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle-doped large area PMMA plates with controlled optical diffusion

Colombo

Tassone

Santolini³

et al. 2013

J. Mater. Chem. C

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Large-area nanocomposite plates (35 cm Â 35 cm Â 1 cm) with tuned optical diffusion were successfully prepared. The poly(methyl-methacrylate) matrix is synthesized by bulk polymerization, and "doped" with some ppm of commercial TiO 2 nanoparticles. These are surface modified with 1-octylphosphonic acid in order to stabilize them in the monomer, as shown by repeated Dynamic Light Scattering measurements over long times. TEM images show that the dispersed TiO 2 nanoparticles are aggregated in irregular and porous clusters of about 100 nm in diameter. The size of these aggregates is also confirmed by UV-visible transmission measurements. TEM images of slices prepared from plates confirm that the nanoparticles do not further aggregate during bulk polymerization. Optical diffusion could be characterized in detail, thanks to the large size of the nanocomposites, by using a home-made optical set-up. This allowed the observation of a number of subtle optical effects related to multiple-scattering, and the direct observation of a 'blue sky effect' associated with the small size of the nanoparticles involved in diffusion.

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Section: Introductionmentioning

confidence: 99%

Nanoparticle-doped large area PMMA plates with controlled optical diffusion

Colombo

Tassone

Santolini³

et al. 2013

J. Mater. Chem. C

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“…The observed increase in haze, more than 40% with increasing the CM-SMC content up to 2.00% can be attributed to the scattering induced by the addition of CM-SMC microspheres, as is the case for the conventional scattering fillers. 17 As mentioned earlier, however, it is completely out of our expectation to see the transmittance increased from 85.43% for the pure PC up to 90.16% for the PC composite containing 1.00 wt% 800CM-SMC fillers (Table 1). Hence, the origins of the abnormal transmittance increase are of great interest for further study.…”

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confidence: 69%

Polymer composites with high haze and high transmittance

Zhang

Wang

et al. 2015

Polym. Chem.

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“…(1) and (2), T*H equals to It ð Þ 90 2:5 I 0 , namely the ratio of the forward scattered light with a direction deviating more than 2.58 to the incident light, similar to the diffusive transmittance introduced in another paper. 30 The peak value of T*H, instructive to the preparation of light scattering sheets, occurs when |l| is about 0.009. It should also be noted that at larger m, stronger backscattering appears; consequently, to obtain a light-diffusing film with more forward scattering, it is necessary to set m close to 1.…”

Section: Mie Scattering Theorymentioning

confidence: 99%

Light scattering materials with tunable optical properties by controlling refractive index of the dispersed phase

Liu

Dong

Xiong

et al. 2016

J of Applied Polymer Sci

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Traditionally, the morphologies of the dispersed phase in Polycarbonate (PC)/poly(styrene-co-acrylonitrile) (SAN) blends were strongly influenced if AN content in SAN changed significantly even under constant processing conditions. This would hinder the pure research intended to study the effect of the refractive index difference between the polymer host and the polymeric dispersed particles on the optical properties tough. Therefore, we respectively prepared different PC/SAN light diffusion sheets with four types of SAN containing different AN content ranging just from 20 to 25 wt %, a narrow range that sufficiently ensures the relatively stable morphology of different SAN in PC matrix. The results suggest that the refractive index of SAN increases with an decreasing AN content, thus narrowing the refractive index difference between PC and SAN and producing PC/SAN(70/30) light diffusion sheets with an increasing transmittance and decreasing haze. The interesting phenomenon is further analyzed using Mie scattering theory. V C 2016Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44156.

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Light diffusing polycarbonate—polycycloolefin blends

Cited by 12 publications

References 1 publication

Nanoparticle-doped large area PMMA plates with controlled optical diffusion

Nanoparticle-doped large area PMMA plates with controlled optical diffusion

Polymer composites with high haze and high transmittance

Light scattering materials with tunable optical properties by controlling refractive index of the dispersed phase

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