Optical properties of polymer blends composed of poly(methyl methacrylate) and ethylene-vinyl acetate copolymer

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[1] [1,Takahashi, Shuji
[2] Okada, Hiroaki
[3] Nobukawa, Shogo
[4] Yamaguchi, Masayuki
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Yamaguchi, M. (m_yama@jaist.ac.jp) | 1600年 / Elsevier Ltd卷 / 48期
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Optical properties for immiscible polymer blends composed of poly(methyl methacrylate); PMMA; and ethylene-vinyl acetate copolymer (EVA) are studied employing various EVA samples with different vinyl acetate contents. PMMA/EVA shows transparency at room temperature when the difference in refractive index between both phases is small. The light transmittance; however; decreases with increasing the ambient temperature. This phenomenon is attributed to the difference in the volume expansion ratio; leading to the difference in refractive index; between PMMA and EVA. It is found that addition of tricresyl phosphate; TCP; improves the transparency and its temperature dependence. As a result; a ternary PMMA/EVA/TCP blend shows high level of transparency in the wide temperature range; although it has apparent phase separated morphology. © 2012 Elsevier Ltd. All rights reserved;
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