Flame-retardant polycarbonate/acrylonitrile-butadiene-styrene based on red phosphorus encapsulated by polysiloxane: Flame retardance, thermal stability, and water resistance
Abstract
Red phosphorus encapsulated by polysiloxane (MRP) was prepared, and the chemical structure and morphology of MRP were characterized by FTIR and TEM, respectively. A series of flame retardant polycarbonate/acrylonitrile-butadiene-styrene containing MRP (PC/ABS/MRP) were prepared via melt-blending. The flame retardance of PC/ABS/MRP was investigated by limiting oxygen index (LOI) and UL-94 test. It was shown that the LOI value was increased to 27.7 and UL-94 achieved a V-0 rating at a 15 wt % loading of MRP. Cone calorimetric results showed that the peak of heat release rate (PHRR) of PC/ABS/15% MRP decreased from 452.7 to 198.0 kW/m2, and the total heat release decreased from 92.9 to 60.7 MJ/m2 compared with virgin PC/ABS. Thermal stability analysis showed that the char yield of the PC/ABS/15% MRP increased from 0 to 16.1 wt % under air atmosphere, and from 15.2 to 27.4 wt % under nitrogen atmosphere compared to virgin PC/ABS, respectively. The sample PC/ABS/15% MRP also showed excellent water resistance of flame retardance in 70°C water for 168 h. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
