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Polymers by [3 + 2] cycloaddition, 6. Polyureas with novel structure elements
Author(s) -
Maier Gerhard,
Nuyken Oskar,
Losert Klaus
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.1994.021950615
Subject(s) - thermal stability , cycloaddition , polymer , thermogravimetry , polymer chemistry , monomer , crystallinity , octane , glass transition , chemistry , solubility , materials science , organic chemistry , catalysis , crystallography , inorganic chemistry
The synthesis of new diisocyanates via “criss‐cross” cycloaddition between aromatic aldazines and diisocyanates as well as their conversion to polyureas is described. The new monomers and polymers contain the heterocyclic 1,3,5,7‐tetraazabicyclo[3.3.0]octane‐2,6‐dione system in their backbone. The polymers are characterized by spectroscopic techniques, DSC, thermogravimetry, and GPC. The influence of the new structure element on solubility, glass transition temperature, crystallinity, and thermal stability is discussed.