Synthesis of a novel flame retardant containing phosphorus and sulfur and its application in polycarbonate

Document Type

Conference Proceeding

Publication Date

1-1-2012

Abstract

A novel flame retardant containing phosphorus and sulfur, bis(2-tienyl)phenylphosphine (BTPP) was synthesized and characterized with Fourier transform infrared spectroscopy, 1H, 13C, and 31P nuclear magnetic resonance. BTPP was used to impart flame retardancy t polycarbonate (PC). Combustion behaviors and thermal degradation properties of PC/BTPP system were assayed by limiting oxygen index (LOI), vertical burning test (UL-94), cone calorimeter test, and thermogravimetric analysis. PC/3 wt% BTPP passed UL-94 V-0 rating with 3.0 mm samples and the LOI value was 36.5%. PC/6 wt% BTPP passed UL-94 V-0 rating with 1.6 mm samples and the LOI value was 38.5%. Scanning electron microscopy revealed that char properties had direct effects on the flame retardancy. Mechanical properties and water resistance of PC/BTPP system were also examined. After water resistance test, PC/3 wt% BTPP with 3.0 mm samples and PC/6 wt% BTPP with 1.6 mm samples kept V-0 rating and mass loss were only 0.2%. © 2012 Society of Plastics Engineers.

Publication Source (Journal or Book title)

Polymer Engineering and Science

First Page

2327

Last Page

2335

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