Fast fabrication of a light-scattering polycarbonate with high transmittance, high haze, and excellent flame-retardant performance

摘要

This 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.