Authors studied the flame retarding effect for the polypropylene-dechlorane-Sb
2O
3 systems at various Sb
2O
3/dechlorane weight ratios.
The flame retarding effects were evaluated with oxygen index,
TG-?Ts/TsR ratio, weight loss rate, and HCl gas evolution time dependence of released amount of SbC
13.
The formation of SbC
13 was examined by X-ray diffraction analysis of heated sample.
The results of the experiment are as follows.
1. The synergistic action between Sb
2O
3 and dechlorane was observed at Sb
2O
3/dechlorane weight ratio of 1/3.
2. The maximum oxygen index at Sb
22O
3/dechlorane weight ratio of 1/3 corresponds to the maximum hydrogen chloride evolution, minimum
TG-Ts/TsR ratio and minimum weight loss rate, respectively.
3. The flame-retardation of polypropylene is influenced not only on the released amount of SbC
3 but also on the formation velocity of SbC
3.
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