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Stress Relaxation Studies of the Viscoelastic Properties of Polymers
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In this article, extensive studies of the viscoelastic properties of polymers undertaken in the author's laboratory by means of the method of stress relaxation are reviewed and a rather complete over-all picture of these phenomena seems to be emerging.Abstract:
Extensive studies of the viscoelastic properties of polymers undertaken in the author's laboratory by means of the method of stress relaxation are here reviewed The discussion is divided into four parts: chemical stress relaxation, stress relaxation in amorphous polymers, stress relaxation in crystalline polymers, and stress relaxation in certain natural polymers and polyelectrolytes Mathematical description of the phenomena are presented in simple form The relation between structure and viscoelastic properties of polymers are discussed and a rather complete over‐all picture of these phenomena seems to be emergingread more
Citations
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Dynamic Covalent Polymer Networks: from Old Chemistry to Modern Day Innovations.
TL;DR: This work designs dynamic covalent polymer networks with unique adaptive properties for vitrimeric rheological behavior and solid-state plasticity for this type of material, and suggests a promising future for this class of materials.
Journal ArticleDOI
Dynamic covalent chemistry in polymer networks: a mechanistic perspective
TL;DR: In this article, a selection of such chemistries is highlighted, with a particular focus on the reaction mechanisms of molecular network rearrangements, and on how various mechanistic profiles can be related to the mechanical and physicochemical properties of polymer materials, in particular in relation with vitrimers, the recently defined third category of polymeric materials.
Journal ArticleDOI
Toward Stimuli-Responsive Dynamic Thermosets through Continuous Development and Improvements in Covalent Adaptable Networks (CANs)
Maciej Podgórski,Benjamin D. Fairbanks,Bruce E. Kirkpatrick,Matthew K. McBride,Alina M. Martinez,Adam Dobson,Nicholas J. Bongiardina,Christopher N. Bowman +7 more
TL;DR: Recent developments in covalent adaptable networks are discussed here with an emphasis on the most effective dynamic chemistries that render these materials to be stimuli responsive, enabling features that make CANs more broadly applicable.
Journal ArticleDOI
Viscoelastic Modeling and Field Validation of Flexible Pavements
TL;DR: In this paper, a three-dimensional finite element (FE) model was developed to simulate pavement responses to vehicular loading at different temperatures and speeds, and compared with field-measured pavement responses from the Virginia Smart Road.
Journal ArticleDOI
Improved thermal and mechanical properties of polybenzoxazines based on alkyl‐substituted aromatic amines
Hatsuo Ishida,Daniel P. Sanders +1 more
TL;DR: The thermal and mechanical properties of polybenzoxazine thermoset networks containing varying amounts of phenolic Mannich bridges, arylamine Mannich bridge, and methylene bridges have been investigated in this article.
References
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Journal ArticleDOI
The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-Forming Liquids
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Beziehungen zwischen elastischen Konstanten und Dehnungsdoppelbrechung hochelastischer Stoffe
Werner Kuhn,F. Grün +1 more
TL;DR: In this article, the optischen Doppelbrechung zur mechanischen Ruckstellkraft (dyn/cm2) erweist sich dabei als unabhangig von der Anzahl der pro cm3 der Substanz vorhandenen Kristallite.
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Mechanical Properties of Polymeric Materials
Arthur V. Tobolsky,Henry Eyring +1 more
TL;DR: In this paper, a molecular model in terms of which the elastic viscous properties of rubber-like substances can be interpreted is presented, and experiments on stress relaxation at constant extension, creep under constant load, extrusion, vibration, and breaking are discussed.
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Mechanical Properties of Substances of High Molecular Weight. VI. Dispersion in Concentrated Polymer Solutions and its Dependence on Temperature and Concentration
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Stress Relaxation of Natural and Synthetic Rubber Stocks
TL;DR: In this paper, the authors measured stress decay as a function of time made at constant elongation on thin bands of gum and tread type natural rubber (Hevea), Neoprene, Butyl, Buna S, and Butaprene N stocks indicate that both secondary and primary bond relaxation occur.