viscoelasticity – Page 2 – Mechanics of Polymers

Shape memory property of amorphous polymer networks. Mechanical model

December 1, 2016 by admin

The shape memory property of amorphous polymer networks is the result of two intrinsic properties of these materials: 1) The viscoelasticity and 2) the time-temperature superposition property. This can be proven by characterizing the material linear viscoelasticity and time-temperature superposition with DMA (dynamic mechanical analysis) tests and by introducing these properties in a TRS (thermo-theologically...

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Shape memory property of amorphous polymer networks. Experimental characterization (1)

July 28, 2016 by admin

I started working on the shape memory property of polymers at CU Boulder thanks to Professor Ken Gall who introduced me to the topic. Focusing on amorphous polymer networks, with several co-workers we have been working on the characterization and the modeling of this property. This post is about the experimental characterization of the...

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Shape memory polymer strain recovery torsion viscoelasticity

Linear viscoelasticity of several carbon-black SBRs

April 12, 2016 by admin

The linear viscoelasticity of several carbon-black filled SBRs were characterized by DMA tests on a DMAQ800 dynamic uniaxial tension machine from TA. Figure 1. Storage modulus and damping factor of several carbon-black filled SBRs measured by uniaxial tension DMA tests. Materials are made of the same gum and filled with 0, 5, 30, 40, 50...

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data sharing DMA SBR viscoelasticity