Carbon disulfide sonopolymer: A comparison with other carbon disulfide polymers

✍ Scribed by F. Cataldo; D. Heymann

• Book ID: 104372717
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 611 KB
• Volume: 35
• Category: Article
• ISSN: 0992-4361
• DOI: 10.1016/s0992-4361(99)80003-4

✦ Synopsis

Intense ultrasonic treatment caused CS2 sonolysis with formation of several products like sulfur, carbon subsulfide C3S2, and a black insoluble sonopolymer. The sonolysis products was analyzed by electronic spectroscopy and liquid chromatography (HPLC). The black insoluble sonopolymer was studied in detail by FT-IR spectroscopy and was found to be chemically similar to the CSz photopolymer and to the piezopolymer. FT-IR shows that the sonopolymer prepared at room temperature is the ladder cartxm subsulfide polymer (C3SD~, having the linear polymer -[S-(C=S)-S-(C=S)-]x-, as minor component. When sonication is conducted at -78°C, FT-IR spectrum shows that the sonopolymer in addition to carbon subsulfide polymer (C3Sz)x contains the carbon disulfide dimer (C2S4) previously detected m the piezopolymer.

A discussion of the mechanism of sonolysis of carbon disulfide shows that the 'laot spot" theory involving high pressure and temperature gcmerated by cavitational bubbles can explain the results at -78°C, but not at room temperature. To explain sonolysis at 0°C or higher temperature, electric breakdown inside cavitational bubbles should be considered.