The reaction of sulphur and sulphur compounds with olefinic substances. Part VI. Factors influencing cyclic sulphide formation in the reaction of sulphur with polyisoprenes

✍ Scribed by Bloomneld, George F.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1949
• Weight: 364 KB
• Volume: 68
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000680208

✦ Synopsis

SULPHIDE FORMATION IN THE REACTION OF SULPHUR WITH POLYISOPRENES

PART vr. FACTORS INFLUENCING CYCLIC

By GEORGE F. BLOOMNELD

Cyclic sulphidcs arc to a large extent secondary products of the reamon of primarily-formcd intermolecular polysulphides with polyisoprene hydrocarbon, and undue prolongation of the time of reaction of sulphur with polyisoprcnes favours cyclic sulphide formation and so reduces the cross-linking efficiency of the sulphur. Various accclcrating substances markedly increase thc cross-linking efficiency either by permitting shorter reaction times to be employed, ting 3 cross-linking nthcr than a cyclizing reaction of the ~~~~~. o ~h i u n m disulphide accelerators in the absence of sulphur bring about cross-1 ng, the linkages being of C-S-C type rather than C -C . 9