Anionic block polymerization of β-lactones initiated by potassium solutions, 1. Synthesis of poly(4-methyl-2-oxetanone-block-2-oxetanone) |
| |
| Authors: | Zbigniew Jedli&#x ski,Marek Kowalczuk,Piotr Kurcok,Lilianna Brzoskowska,Jan Franek |
| |
| Affiliation: | Zbigniew Jedliński,Marek Kowalczuk,Piotr Kurcok,Lilianna Brzoskowska,Jan Franek |
| |
| Abstract: | The block polymerization of 4-methyl-2-oxetanone (β-butyrolactone) with 2-oxetanone (β-propiolactone) proceeds fast with a yield of more than 90%, in the presence of potassium solutions in THF containing 18-crown-6. Poly(4-methyl-2-oxetanone-block-2-oxetanone) polymers having the expected molecular weight and composition are formed by this way. Their glass transition and melting temperatures as well as their melting enthalpies, determined by DSC, show a strict correlation with block polymer composition. |
| |
| Keywords: | |
|
|
