Synergistic action of Sb 2 O 3  with bromine‐containing flame retardant in polyolefins. 1—the variance in their performance versus Sb/Br ratio | Zendy

Handa Takashi | Zendy; Nagashima Toshiaki | Zendy; Ebihara Naobumi | Zendy

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Synergistic action of Sb 2 O 3 with bromine‐containing flame retardant in polyolefins. 1—the variance in their performance versus Sb/Br ratio

Author(s) -

Handa Takashi,

Nagashima Toshiaki,

Ebihara Naobumi

Publication year - 1979

Publication title -

fire and materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.482

H-Index - 58

eISSN - 1099-1018

pISSN - 0308-0501

DOI - 10.1002/fam.810030202

Subject(s) - bromine , antimony , fire retardant , chemistry , antimony trioxide , volatilisation , thermogravimetric analysis , polypropylene , nuclear chemistry , organic chemistry

The synergistic action of antimony (Sb) with bromine (Br) was studied for polypropylene‐2,3‐dibromopropylpentabromophenyl ether–Sb 2 O 3 systems at various Sb/Br molar ratios. Oxygen index, weight loss rate and heating value were used to evaluate the retardant effect. Bromine and antimony emission and their material balances were measured by gravimetric and X‐ray fluorometric analysis of heated samples at each reaction time. Retarded HBr formation in the gaseous phase through SbBr 3 , SbOBr and Sb 4 O 5 Br 2 was proved by X‐ray diffraction analysis of heated residues and model products. SbBr 3 and HBr formation were greatest at Sb/Br ratios of 1/3 and 1/4, respectively, while the highest oxygen index and the lowest weight loss rate and heating value were obtained at 1/4. Consequently, HBr will most probably produce the retardant effect rather than SbBr 3 . Effective synergistic action at the Sb/Br ratio of 1/4 is explained by presuming the formation of an acidic HBr.SbBr 3 complex in the molten phase for the particular reaction pattern of bromine in 2,3‐dibromopropylpentabromophenyl either.

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