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Polyurethane elastomers containing polybutadiene and aliphatic diols: Structure‐property relationships
Author(s) -
Siegmann A.,
Cohen D.,
Narkis M.
Publication year - 1987
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.760271512
Subject(s) - polybutadiene , elastomer , materials science , glass transition , polyurethane , polymer chemistry , composite material , transition temperature , polymer science , copolymer , polymer , superconductivity , physics , quantum mechanics
The effect of aliphatic diols on the structure and some mechanical properties of polyurethane elastomers containing hydroxyl‐terminated polybutadiene and three different diisocyanates was studied. Differential scanning calorimetric studies revealed the existence of several thermal transitions, characteristic of structures of multiphased elastomers. Three transition temperatures, a subzero transition and two high temperature transitions, were found in some of the elastomers. The higher‐high temperature transition reflects ordered domains, also supported by X‐ray diffraction, Higher degree of order was achieved with longer diols. The mechanical behavior is affected by the multiphase nature of the elastomers, especially by the morphology of the hard segment domains. The structureproperty relationships for the three component polyurethane elastomers in question thus have been established.