Equilibrium anionic polymerization of α-methylstyrene in p-dioxane

✍ Scribed by Léonard, J. ;Malhotra, S. L.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1971
• Tongue: English
• Weight: 398 KB
• Volume: 9
• Category: Article
• ISSN: 0449-296X
• DOI: 10.1002/pol.1971.150090716

✦ Synopsis

Abstract

The equilibrium anionic polymerization of α‐methylstyrene in p‐dioxane, with potassium as initiator, has been investigated at 5, 15, 25, and 40°C by using high‐vacuum techniques. The comparison of these results with those obtained previously for the equilibrium polymerization of α‐methylstyrene in tetrahydrofuran revealed that, although the values of Δ__G__~1c~, the free‐energy change upon the polymerization of 1 mole of liquid monomer to 1 bases‐mole of liquid amorphous polymer of infinite chain length, are the same for both systems, there is a distinct effect of the solvent. This effect is reflected in the value of monomer equilibrium concentration and its variation with polymer concentration and is explained in terms of a solvent–monomer and solvent–polymer interaction parameter.