title: [Study on the structures of poly (urea) urethane by FTIR and 1H NMR methods].
abstract: Using the FTIR and 1H NMR methods, the structures, relative ratio and inventory ratio of segmented poly (urea) urethanes which are synthesized with different extenders (1,4-butandiol, ethylene diamine and their mixtures)have been studied successfully and the ratationship between the branch ratio and inventory ratio has been determined.
authors.affiliation: Department of Chemistry, Nankai University, 300071 Tianjin.
authors.forename: C
authors.initials: C
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: Q
authors.initials: Q
authors.lastname: Huang
authors.forename: J
authors.initials: J
authors.lastname: Huang
authors.forename: M
authors.initials: M
authors.lastname: Han