Anionic polymerization of lactones initiated by alkali graphitides. II. Changes in the KC 24 structure during polymerization of lactones

The structural changes in the potassium graphitide KC 24 in its interaction with ϵ‐caprolactone, γ‐butyrolactone and pivalolactone are examined by profilometric measurement and electron scanning microscopy. The interaction of KC 24 with a nonpolymerizable lactone‐γ‐butyrolactone proceeds without delamination of the graphitide. The polymerization of ϵ‐caprolactone and pivalactone in the interlayer spaces of KC 24 leads to destruction of the initiators structure. An increase in the temperature and monomer concentration enhances the delamination of the graphitide.