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Structure‐Property relationships in polyacrylate‐poly(urethane‐urea) interpenetrating polymer networks
Author(s) -
Matsuo M.,
Kwei T. K.,
Klempner D.,
Frisch H. L.
Publication year - 1970
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760100604
Subject(s) - prepolymer , materials science , curing (chemistry) , ultimate tensile strength , elongation , polymer , composite material , phase (matter) , urea , viscoelasticity , polymer chemistry , chemical engineering , polyurethane , organic chemistry , chemistry , engineering
Abstract Interpenetrating polymer networks of polyacrylate (A) and poly (urethane‐urea) (U) were prepared by mixing lattices of self‐curing polyacrylate and urethane‐urea prepolymer followed by subsequent curing of each network. The structures of the mixtures were analyzed by the dynamic viscoelasticity and the electron microscopy. It was found that a phase inversion occurred from the “U‐phase particles in A‐phase matrix” to the “A‐phase in U‐phase matrix” at A/U ≑ 30/70 as the U‐phase content increases. With increasing A‐phase content, tensile strength started to increase and elongation‐to‐break becomes almost constant after the A‐phase formed a continuous phase. This implies that the tensile properties are closely related to the morphological features.