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Relation of structure to properties in polyurethanes: Effect of branching
Author(s) -
Cluff E. F.,
Gladding E. K.,
Rogan J. B.
Publication year - 1961
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1961.070051312
Subject(s) - branching (polymer chemistry) , polyurethane , materials science , resilience (materials science) , crystallization , modulus , polymer , viscosity , composite material , polymer chemistry , chemical engineering , engineering
The effect of short arylurethane branches on the physical properties of a linear polyurethane is described. Branches of this type reduce crystallization tendencies of the polymer and alter its bulk and solution viscosity behavior. Vulcanizate properties, such as resilience and modulus, are not affected. The synthesis of polyurethanes containing longchain branches with terminal cure sites is described. Dynamic behavior of these latter polymers, as judged by Yerzley resilience, improves as the proportion of long chain branches in the vulcanizate network is reduced.