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Proposal of the Boltzmann-like superposition principle for nonlinear tensile creep of thermoplastics
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SYSNO ASEP 0309141 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Proposal of the Boltzmann-like superposition principle for nonlinear tensile creep of thermoplastics Title Návrh Boltzmannovského superpozičního principu pro nelineární tahový creep termoplastů Author(s) Kolařík, Jan (UMCH-V)
Pegoretti, A. (IT)Source Title Polymer Testing. - : Elsevier - ISSN 0142-9418
Roč. 27, č. 5 (2008), s. 596-606Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords multistep nonlinear tensile creep ; free volume ; internal time-tensile strain superposition Subject RIV CD - Macromolecular Chemistry CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000257375700008 DOI https://doi.org/10.1016/j.polymertesting.2008.03.002 Annotation Consistent application of the free volume approach, including the strain-induced free volume, allowed us to derive and verify the internal time–tensile strain superposition for a series of single-step nonlinear creeps. The Boltzmann-like superposition principle for multistep nonlinear tensile creep, proposed in this paper, consists of the separation of individual creeps, their reconstruction for the initial free volume by introducing a specific internal time, and the superposition of the reconstructed creeps. The procedure is demonstrated using creep data for three types of commercial polypropylene. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2009
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