DTIC ADA474714: Viscoelastic Characterization of Aliphatic Polyurethane pdf

DTIC ADA474714: Viscoelastic Characterization of Aliphatic Polyurethane

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The viscoelastic properties of several commercially available aliphatic thermoplastic polyurethanes were characterized. Differential scanning calorimetry showed that for Deerfield 4700, Inter Materials IM 800, IM 800A, IM 1600, and IM 2500, there is a permanent physical change that occurs during heating. Dynamic mechanical analysis and shear rheometry were used to generate elastic and shear modulus master curves in the frequency domain for Inter Materials IM 800 A. The Williams-Landel-Ferry constants and Prony coefficients were extracted from these master curves. Quasi-static mechanical properties were determined from tensile tests on dog bone samples and compression tests on cylindrical samples. Visual image correlation was used to determine the Poisson’s ratio from the mechanical tests by simultaneously capturing longitudinal and lateral strain

• Creator/s: Defense Technical Information Center
• Date: 10/1/2007
• Year: 2007
• Book Topics/Themes: DTIC Archive, MacAloney, Neil, VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG, *VISCOELASTICITY, *ALIPHATIC COMPOUNDS, *DIFFERENTIAL SCANNING CALORIMETRY, COMPRESSION, SHEAR PROPERTIES, OPTICAL IMAGES, THERMOPLASTIC RESINS, STATICS, POISSON RATIO, RHEOMETERS, FREQUENCY DOMAIN, POLYURETHANE RESINS, COEFFICIENTS, TENSILE PROPERTIES, MECHANICAL PROPERTIES, PHYSICAL PROPERTIES

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