Khan, M. B. (2009) INTELLIGENT VISCOELASTIC POLYURETHANE INTRINSIC NANO COMPOSITES. TMS 2009 138TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS . 471-477 .
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Polyurethanes are multiphase systems comprising intrinsically variant Nano-domains. The material properties can be tailored by adjusting the relative proportions and organizing the structure of the hard and soft segments akin to the spring-dashpot system in an automobile. The paper describes how an intelligent PU system is created to offer smart response to mechanical and vibration stimuli. In this work unidirectional, dynamic (DMTA), acoustic and impact testing results are qualified with the unique viscoelastic character that determines the rate-temperature response of the Nano-composite. Attenuated total reflection infrared spectroscopy (ATR-IR) and DMTA offer logical explanation of the observed viscoelastic behavior in terms of the Nano-domains. Acoustic and impact attenuation are correlated with the mechanical modulus and loss tangent of the polymer. Finally, autodyne simulation reveals the unique shock absorbent behavior of the material layer when retrofitted to concrete structure.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||16 Nov 2009 09:39|
|Last Modified:||16 Nov 2009 09:39|
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