Abstract
AbstractThis paper used a simple, economical, and environmentally benign melt blending process to prepare light‐scattering polycarbonate (PC) containing flame‐retardant scatterers poly(styrene‐co‐acrylonitrile) (SAN)‐hydroxyl‐grafted methylphenylsilicone resin (PSi). During processing, the strong hydrogen bond interaction between PSi and SAN enabled the in‐situ formation of flame‐retardant scatterers SAN‐PSi. With the increase of PSi content, the flame‐retardant properties of PC/SAN‐PSi were greatly improved. After adding 12% PSi, the limit oxygen index (LOI) of the composites increased from 19.0% to 28.0%. The peak heat release rate (pk‐HRR) dropped from 334.3 W g−1 to 213.4 W g−1 and the total heat release rate (Total HR) reduced from 21.7 kJ g−1 to 19.9 kJ g−1, while the transmittance and haze of the composites remained above 88% and 90% respectively, indicating PC/SAN‐PSi was excellent in both light‐scattering and flame‐retardant ability. In short, this work provides an efficient and environment‐friendly fabrication to prepare the light‐scattering PC with excellent flame‐retardant performance, which is expected to be applied to LED and other optoelectronic fields.
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