Isolation and cationic ring‐opening polymerization of 2,3,5,6‐tetrahydroimidazo[2,1‐ b ][1,3]oxazole to produce a thermally stable polyurea | Zendy

Miyamoto Masatoshi | Zendy; Watanabe Toshio | Zendy; Kimura Yoshiharu | Zendy

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Isolation and cationic ring‐opening polymerization of 2,3,5,6‐tetrahydroimidazo[2,1‐ b ][1,3]oxazole to produce a thermally stable polyurea

Author(s) -

Miyamoto Masatoshi,

Watanabe Toshio,

Kimura Yoshiharu

Publication year - 1997

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.1997.030181001

Subject(s) - cationic polymerization , thermogravimetry , polymerization , oxazole , polymer chemistry , materials science , bicyclic molecule , polymer , ring opening polymerization , thermal stability , chemistry , stereochemistry , organic chemistry , composite material , inorganic chemistry

A bicyclic pseudourea, 2,3,5,6‐tetrahydroimidazo[2,1‐ b ][1,3]oxazole ( 1 ), was isolated for the first time, and its cationic and spontaneous polymerizations were examined. Both polymerizations gave poly(1,3‐imidazolidin‐2‐one‐1,3‐diylethylene) ( 2 ) in high yields. The polymer is a crystalline solid with glass transition and melting temperature of 51°C and 286°C, respectively. Thermogravimetry showed that it is stable up to 450°C under nitrogen.

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