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Ring‐opening‐closing alternating copolymerization of 2‐methyl‐2‐oxazoline with N ‐methyldiacrylamide
Author(s) -
Kadokawa Junichi,
Matsumura Yoshitaka,
Kobayashi Shiro
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021951115
Subject(s) - copolymer , zwitterion , polymer chemistry , monomer , ring (chemistry) , oxazoline , chemistry , ether , closing (real estate) , ring opening polymerization , reaction mechanism , catalysis , polymer , organic chemistry , molecule , political science , law
This paper describes a new ring‐opening‐closing alternating copolymerization (ROCAC) of 2‐methyl‐2‐oxazoline (five‐membered cyclic imino ether, 1 ) with N ‐methyldiacrylamide ( 2 ). The reaction of a 1 : 1 monomer feed ratio proceeded without any added catalyst to give an alternating copolymer 3 having two structural units formed by ring‐opening and ring‐closing (cyclization). The structure of copolymer 3 was determined by 1 H, 13 C NMR, and IR spectroscopies. The extent of cyclization was at most 65%. The copolymerization was reasonably explained by a mechanism of propagation via zwitterion intermediates.