End-Functionalized polymers by living cationic polymerization. IV. Poly(vinyl ethers) with acidic or basic terminal groups by functional initiator method

✍ Scribed by Tamotsu Hashimoto; Etsu Takeuchi; Mitsuo Sawamoto; Toshinobu Higashimura

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 527 KB
• Volume: 28
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/pola.1990.080280514

✦ Synopsis

Abstract

Carboxylic acid or primary amine‐terminated poly(isobutyl vinyl ethers) were synthesized by living cationic polymerizations with functionalized initiators (CH~3~CHIOCH~2~CH~2~  X; X: that are the adducts of the corresponding vinyl ethers (CH~2~  CH  OCH~2~CH~2~X) with hydrogen iodide. In the presence of iodine, these initiators induced living cationic polymerization of isobutyl vinyl ether to give polymers with the α‐end group of X originating from the initiators. The polymer molecular weights were regulated by the monomer to initiator feed ratio and the molecular weight distributions were very narrow (M~w~/M~n~ ≤ 1.15). Subsequent deprotection of the terminal group X led to polymers with a terminal carboxylic acid or primary amine. ^1^H‐ and ^13^C‐NMR analyses showed that the end functionalities of these polymers were all close to unity.