Understanding the Mechanisms Involved in Shape Memory Starch: Macromolecular Orientation, Stress Recovery and Molecular Mobility

The effect of a deformation near and above the glass transition on macromolecular orientation, residual stress, and molecular mobility was investigated on amorphous stimuli-responsive starch. The recovery stress, linked to the residual stress in the temporary shape, evolves linearly with the macromo...

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Published inMacromolecules Vol. 44; no. 23; pp. 9384 - 9389
Main Authors Véchambre, Cyril, Buléon, Alain, Chaunier, Laurent, Gauthier, Catherine, Lourdin, Denis
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 13.12.2011
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Abstract The effect of a deformation near and above the glass transition on macromolecular orientation, residual stress, and molecular mobility was investigated on amorphous stimuli-responsive starch. The recovery stress, linked to the residual stress in the temporary shape, evolves linearly with the macromolecular orientation. Increasing the deformation temperature decreases the residual stress and the macromolecular orientation. This also leads to a higher glass transition temperature induced by a decrease in molecular mobility. The local structures potentially involved in orientation and stress recovery and their behavior during deformation at different temperatures are discussed.
AbstractList The effect of a deformation near and above the glass transition on macromolecular orientation, residual stress, and molecular mobility was investigated on amorphous stimuli-responsive starch. The recovery stress, linked to the residual stress in the temporary shape, evolves linearly with the macromolecular orientation. Increasing the deformation temperature decreases the residual stress and the macromolecular orientation. This also leads to a higher glass transition temperature induced by a decrease in molecular mobility. The local structures potentially involved in orientation and stress recovery and their behavior during deformation at different temperatures are discussed. © 2011 American Chemical Society.
The effect of a deformation near and above the glass transition on macromolecular orientation, residual stress, and molecular mobility was investigated on amorphous stimuli-responsive starch. The recovery stress, linked to the residual stress in the temporary shape, evolves linearly with the macromolecular orientation. Increasing the deformation temperature decreases the residual stress and the macromolecular orientation. This also leads to a higher glass transition temperature induced by a decrease in molecular mobility. The local structures potentially involved in orientation and stress recovery and their behavior during deformation at different temperatures are discussed.
Author Buléon, Alain
Chaunier, Laurent
Véchambre, Cyril
Gauthier, Catherine
Lourdin, Denis
AuthorAffiliation Unité Biopolymères Interactions et Assemblages
Université de Lyon
AuthorAffiliation_xml – name: Unité Biopolymères Interactions et Assemblages
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  givenname: Cyril
  surname: Véchambre
  fullname: Véchambre, Cyril
– sequence: 2
  givenname: Alain
  surname: Buléon
  fullname: Buléon, Alain
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  givenname: Laurent
  surname: Chaunier
  fullname: Chaunier, Laurent
– sequence: 4
  givenname: Catherine
  surname: Gauthier
  fullname: Gauthier, Catherine
– sequence: 5
  givenname: Denis
  surname: Lourdin
  fullname: Lourdin, Denis
  email: denis.lourdin@nantes.inra.fr
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Issue 23
Keywords Glass transition
Shape memory effect
Potato starch
Mechanical properties
Temperature effect
Oside polymer
Tensile property
Experimental study
Molecular relaxation
Mechanism
Deformation
Starch
Shape memory
Macromolecules
Glass
Stimuli-responsive
Residual stresses
Deformation temperatures
Recovery
Local structure
Molecular orientation
Temporary shapes
Molecular mobility
Stress recovery
Recovery stress
Macromolecular orientation
Language English
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Snippet The effect of a deformation near and above the glass transition on macromolecular orientation, residual stress, and molecular mobility was investigated on...
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SubjectTerms Applied sciences
Engineering Sciences
Exact sciences and technology
Materials
Natural polymers
Physicochemistry of polymers
Starch and polysaccharides
Title Understanding the Mechanisms Involved in Shape Memory Starch: Macromolecular Orientation, Stress Recovery and Molecular Mobility
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