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Polyurethane Ionomers, a New Class of Block Polymers
Author(s) -
Dieterich D.,
Keberle W.,
Witt H.
Publication year - 1970
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.197000401
Subject(s) - ionomer , polyurethane , aqueous solution , polymer , hydrogen bond , elastomer , ionic bonding , polymer chemistry , materials science , polymer science , phase (matter) , chemical engineering , polar , chemistry , composite material , copolymer , organic chemistry , molecule , ion , physics , astronomy , engineering
Linear polyurethanes containing ionic centers at wide intervals are heteropolymers having a pronounced segment structure, i.e. ionomers. As a result of interactions between chains (Coulomb forces and hydrogen bonds), their properties are similar to those of crosslinked elastomers. They are strongly associated both in organic and in aqueous solutions. Polyurethane ionomers in polar organic solvents spontaneously form stable aqueous dispersions on addition of water, with the ionomer as the disperse phase. The particle size can be varied between 20 nm and 1 mm.