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initial weight loss occurred at about this temperature. The data of the thermal behavior are summarized in Table IV.In summary, we have shown that poly(aliphatic sulfides) with high molecular weights are readily prepared by the polycondensation of sodium sulfide with dibromoalkanes in the presence of quaternary ammonium salts such as CTMAC or CTMAB and phosphonium salts such as CTBPB. Since this preparative method is simple and gives quantitatively polysulfides of high molecular weight, it is generally superior to conventional methods for the synthesis of poly (aliphatic sulfides).

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