Synthesis and characterization of some oligothioacrylate esters and their polymers—II

✍ Scribed by A.M. Rabie

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 367 KB
• Volume: 8
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(72)90125-5

✦ Synopsis

Condensation telomerization is used for the synthesis of a new class of oligothioacrylate esters by means of the interaction of various dicarboxylic acids with thiodiglycol and methacrylic acid. During the condensation telomerization, the thiodiglycol undergoes homopoly condensation, the mechanism of which is suggested. The length of the polythiodiglycol unit entering the oligothioester chain depends on the activity of the dicarboxylic acid.

The i.r. spectra and polymerizahilities of the synthesized oligothioesters under different conditions show the probable formation of intermolecular associations between the sulphur atom and the double bond. It has been established that peroxidic compounds cannot initiate polymerization of the oligomers; the use of azo-bis-isobutyronitrile as initiator leads to the production of crosslinked polymers. The polymers possess low glass temperature, elastomer properties and stability towards heat and solvents.