Cyclopolymerization of N,N′-Bis(phenylsulfonyl)-N,N′-divinylethylenediamine and the Related Monomer

Autor:	Masahiro Miyajima, Toyoji Kakuchi, Kazuaki Yokota, Naoya Sugimoto, Katsuyuki Tsuda, Masahiro Ohara
Rok vydání:	1999
Předmět:	Kinetic chain length Chain-growth polymerization Polymers and Plastics Bulk polymerization Polymerization Chemistry Polymer chemistry technology industry and agriculture Materials Chemistry Cationic polymerization Solution polymerization Ionic polymerization Ring-opening polymerization
Zdroj:	Polymer Journal. 31:442-446
ISSN:	1349-0540 0032-3896
DOI:	10.1295/polymj.31.442
Popis:	The cationic polymerization of 1,7-diene monomers 1a and 1b produced polymers 2a and 2b with seven-membered rings as a precursor of azacrown polymer. SnCl4 and BF3·OEt2 in dichloromethane were effective for polymerization. Sulfuric acid was less effective and trifluoroacetic acid was ineffective. The molecular weights reached a maximum of 17000 and 34000 for 2a and 2b, respectively. Monomer 1a polymerized with 100% cyclization. Although all the vinyl groups participated also in the polymerization of 1b, GPC traces of 2b showed a pronounced leading in the region of higher molecular weight by some participation of chain branching. The monomers were unstable to convert to 2-methylimidazolidines 9a and 9b, when allowed to stand in contact with the atmosphere. The polymerization formed seven-membered ring units, but the cyclization reaction resulted in five-membered ring compounds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c3491fe0c39a53758c3024d76a5bde9 https://doi.org/10.1295/polymj.31.442 Zobrazit plný text záznamu