✦ LIBER ✦

The effect of solvents and polyethylene glycol on the synthesis of linear and cyclic poly(methylene sulfide)

✍ Scribed by Jerzy Jeczalik

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 194 KB
Volume: 34
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19960430)34:6<1083::aid-pola17>3.0.co;2-3

No coin nor oath required. For personal study only.

✦ Synopsis

The condensation polymerization of sodium sulfide with methylene chloride in various solvents was studied in order t o assess the influence of polarity on the yield and composition of condensation products. T h e effect of addition of polyethylene glycol was also studied. I t has been found that the overall yield of polythiomethylenes rises from 13.9% in methanol to 85.2% (methanol, PEG15000). The use of solvents of higher polarity promotes the linear oligomers, whereas in methanol the cyclic products predominate. In presence of PEG the this equilibrium is shifted towards tetrathiane. The observed phenomena are discussed in terms of solvents polarity and reaction media viscosity. 0 1996 John Wiley & Sons, Inc.

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