Complete Set of Enthalpy Recovery Data Using Flash DSC: Experiment and Modeling

Complete Set of Enthalpy Recovery Data Using Flash DSC: Experiment and Modeling

Enthalpy recovery of a single polystyrene thin film is quantified by both experiments using Flash DSC and modeling using a new modified TNM model. Experimental data include Kovacs’ three signatures of structural recovery: intrinsic isotherms after temperature down jumps, the asymmetry of approach af...

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Bibliographic Details
Published in:Macromolecules Vol. 51; no. 4; pp. 1549 - 1558
Main Authors: Grassia, Luigi, Koh, Yung P, Rosa, Mattia, Simon, Sindee L
Format: Journal Article
Language:English
Published: American Chemical Society 27-02-2018
Online Access:Get full text
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Summary:Enthalpy recovery of a single polystyrene thin film is quantified by both experiments using Flash DSC and modeling using a new modified TNM model. Experimental data include Kovacs’ three signatures of structural recovery: intrinsic isotherms after temperature down jumps, the asymmetry of approach after temperature down and up jumps of the same size, and the memory effect after a two-step history. A new modified TNM model is proposed to quantitatively fit all three signatures of structural recovery with a single set of model parameters. Here, we elucidate the detailed derivation of the new modified model and demonstrate its applicability to the experimental Flash DSC results.
ISSN:0024-9297
1520-5835
DOI:10.1021/acs.macromol.7b02277