Performances of a Polymeric Intumescent Flame Retardant in Styrene Butadiene Rubber

Abstract

A polymeric intumescent flame retardant, PPVAM, was synthesized by the reaction of polyvinyl alcohol with phosphoric acid, and further with melamine. Flame-retardant properties of PPVAM in styrene butadiene rubber (SBR) were evaluated by using LOI and UL-94 test, and thermal decomposition and char of SBR/PPVAM composites were investigated by thermogravimetry, Muffle and SEM. The results indicate that SBR/PPVAM composites on burning can produce a multi-celluar char, resulting in good flame-retardant properties. The SBR/PPVAM composites after 70°C water treatment for 7 days still maintain good flame retardancy. Moreover, mechanical properties of SBR/PPVAM composites are studied.

Keywords:

• Polymeric intumescent flame retardant
• Properties
• Styrene butadiene rubber

ACKNOWLEDGMENTS

This work was financially supported by the National Natural Science Foundation of China (No. 21174106), the open fund of the Shanghai Key Lab of Electric Insulation and Thermal Aging, and Natural Science Research Fund of Anhui Province (KJ2008A070).