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High‐extension properties of polyurethane elastomers—effects of variation of the ester isocyanate ratio
Author(s) -
Delides Costas G.,
Pethrick Richard A.
Publication year - 2015
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.24134
Subject(s) - polyurethane , materials science , elastomer , isocyanate , context (archaeology) , polymer science , polymer , composite material , polymer chemistry , paleontology , biology
The effects of changing the ratio of 4,4′‐diphenyl methane diisocyanate (MDI) to ester on the stress–strain extension characteristics of various polyurethane elastomers are reported. The data was analyzed using phenomenological theories appropriate to low, medium, and high extensions and the effect of non‐Gaussian terms are considered. Analysis of the high extension data using the Morris theory provides elastic constants which are characteristics of the polyurethane networks. The values of theses constants are discussed in the context of the expected variations of the morphology in these polymers. POLYM. ENG. SCI., 55:2433–2438, 2015. © 2015 Society of Plastics Engineers