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原文传递 Quasi Static Tensile Deformation Measurements of Select Model Poly(urethane urea) (PUU) Elastomers.

题名：	Quasi Static Tensile Deformation Measurements of Select Model Poly(urethane urea) (PUU) Elastomers.
作者：	Hsieh, A. J.; Moy, P.
关键词：	Elastomers, Tensile strength, Measurement, Strain rate, Molecular weight, Mechanical properties, Composite materials, Stiffness, Nuclear magnetic resonance, Dynamic response, Poly(urethane urea) elastomers, Dynamic strain-rate hardening
摘要：	The molecular influence on quasi-static mechanical properties of select model 4,4-dicyclohexylmethane diisocyanatediethyltoluenediamine-poly(tetramethylene oxide)-based poly(urethane urea) (PUU) elastomers is investigated. Increasing the hard segment (HS) content gives rise to PUUs with higher stiffness, higher flow stress, as well as greater strain hardening upon tensile deformation. Furthermore, PUUs with similar HS contents but varying in the molecular weight (MW) of poly(tetramethylene oxide) reveal a significant difference in the mechanical deformation response, particularly the ultimate tensile strength, in addition to earlier reported observations that dynamic strain-rate sensitivity of these PUUs was strongly dependent upon the MW of poly(tetramethylene oxide). These results highlight that a proper choice of PUUs with optimized tensile strength in addition to the desired dynamic strain-rate hardening characteristics is required for use in the design of a multilayer matrix composite.
报告类型：	科技报告