Synergistic Action of Sb203 with Dechlorane for the Flame Retarded Polypropylene
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概要
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Authors studied the flame retarding effect for the polypropylene-dechlorane-Sb<SUB>2</SUB>O<SUB>3</SUB> systems at various Sb<SUB>2</SUB>O<SUB>3</SUB>/dechlorane weight ratios.<BR>The flame retarding effects were evaluated with oxygen index, <I>T<SUB>G</SUB>-?T<SUB>s</SUB>/T<SUB>s</SUB>R</I> ratio, weight loss rate, and HCl gas evolution time dependence of released amount of SbC<SUB>13</SUB>.<BR>The formation of SbC<SUB>13</SUB> was examined by X-ray diffraction analysis of heated sample.<BR>The results of the experiment are as follows.<BR>1. The synergistic action between Sb<SUB>2</SUB>O<SUB>3</SUB> and dechlorane was observed at Sb<SUB>2</SUB>O<SUB>3</SUB>/dechlorane weight ratio of 1/3.<BR>2. The maximum oxygen index at Sb<SUB>2</SUB>2O<SUB>3</SUB>/dechlorane weight ratio of 1/3 corresponds to the maximum hydrogen chloride evolution, minimum <I>T<SUB>G</SUB>-T<SUB>s</SUB>/T<SUB>s</SUB>R</I> ratio and minimum weight loss rate, respectively.<BR>3. The flame-retardation of polypropylene is influenced not only on the released amount of SbC<SUB>3</SUB> but also on the formation velocity of SbC<SUB>3</SUB>.
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