Premium
Novel synthesis of polyureas by ring‐opening polyaddition‐condensation reaction of 2‐phenyl‐1,3,4‐oxadiazolin‐5‐one with diamines
Author(s) -
Saegusa Yasuo,
Nakamura Shigeo
Publication year - 1998
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/(sici)1521-3927(19980401)19:4<177::aid-marc177>3.0.co;2-c
Subject(s) - condensation polymer , polymer chemistry , ether , ring (chemistry) , diamine , condensation reaction , chemistry , condensation , materials science , polymer , catalysis , organic chemistry , physics , thermodynamics
A novel method for the synthesis of polyureas has been developed. This method involves ring‐opening addition reaction of 2‐phenyl‐1,3,4‐oxadiazolin‐5‐one with diamines, bis(4‐aminophenyl) ether, 4,4′‐methylenedianiline and m ‐xylylenediamine, followed by self‐polycondensation of the resulting ring‐opened adducts. Polymerizations in m ‐cresol at 150°C proceeded fast and were almost completed within 5 h. Polyureas were produced with reduced viscosities up to 0,38 dL · g −1 . A model compound study was performed to demonstrate the feasibility of the reaction for the formation of polyureas.