Journal ArticleDOI
Self-healing and thermoreversible rubber from supramolecular assembly
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TLDR
The design and synthesis of molecules that associate together to form both chains and cross-links via hydrogen bonds and the system shows recoverable extensibility up to several hundred per cent and little creep under load are designed and synthesized.Abstract:
Rubbers exhibit enormous extensibility up to several hundred per cent, compared with a few per cent for ordinary solids, and have the ability to recover their original shape and dimensions on release of stress. Rubber elasticity is a property of macromolecules that are either covalently cross-linked or connected in a network by physical associations such as small glassy or crystalline domains, ionic aggregates or multiple hydrogen bonds. Covalent cross-links or strong physical associations prevent flow and creep. Here we design and synthesize molecules that associate together to form both chains and cross-links via hydrogen bonds. The system shows recoverable extensibility up to several hundred per cent and little creep under load. In striking contrast to conventional cross-linked or thermoreversible rubbers made of macromolecules, these systems, when broken or cut, can be simply repaired by bringing together fractured surfaces to self-heal at room temperature. Repaired samples recuperate their enormous extensibility. The process of breaking and healing can be repeated many times. These materials can be easily processed, re-used and recycled. Their unique self-repairing properties, the simplicity of their synthesis, their availability from renewable resources and the low cost of raw ingredients (fatty acids and urea) bode well for future applications.read more
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Shape memory polymers: Past, present and future developments
TL;DR: Shape memory polymers (SMPs) as mentioned in this paper represent a highly interesting class of materials and have gained significant interest in recent years, thus, the variety of materials investigated virtually exploded and several promising shape memory effects have been developed.
Journal ArticleDOI
Malleable and Self-Healing Covalent Polymer Networks through Tunable Dynamic Boronic Ester Bonds
TL;DR: The use of tunable rates of boronic ester transesterification to tune the malleability and self-healing efficiencies of bulk materials and demonstrates the possibility of transferring small molecule kinetics to dynamic properties of bulk solid material.
Journal ArticleDOI
Dynamic urea bond for the design of reversible and self-healing polymers
TL;DR: The rational design of hindered urea bonds are reported and the use of them to make polyureas and poly(urethane-ureas) capable of catalyst-free dynamic property change and autonomous repairing at low temperature is reported.
Journal ArticleDOI
Self‐Healing Supramolecular Gels Formed by Crown Ether Based Host–Guest Interactions
TL;DR: Two supramolecular gels are stimuli-responsive materials that respond to changes of the pH value and are also self-healing materials, as can be seen by eye and as evidenced by rheological data.
Journal ArticleDOI
Macroscopic self-assembly through molecular recognition
TL;DR: It is demonstrated that well-defined molecular-recognition events can be used to direct the assembly of macroscopic objects into larger aggregated structures.
References
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MonographDOI
Supramolecular Chemistry: Concepts and Perspectives
TL;DR: From molecular to supramolescular chemistry: concepts and language of supramolecular chemistry, molecular recognition, information, complementarity molecular receptors - design principles and more.
Journal ArticleDOI
Reversible Polymers Formed from Self-Complementary Monomers Using Quadruple Hydrogen Bonding
Rint P. Sijbesma,Felix Hugo Beijer,Felix Hugo Beijer,Luc Brunsveld,Luc Brunsveld,B. J. B. Folmer,B. J. B. Folmer,J. H. K. Ky Hirschberg,J. H. K. Ky Hirschberg,Ronald Frans Maria Lange,Ronald Frans Maria Lange,Jimmy K. L. Lowe,Jimmy K. L. Lowe,E. W. Meijer,E. W. Meijer +14 more
TL;DR: 2-ureido-4-pyrimidone that dimerize strongly in a self-complementary array of four cooperative hydrogen bonds were used as the associating end group in reversible self-assembling polymer systems.
Journal ArticleDOI
Reptation of living polymers: dynamics of entangled polymers in the presence of reversible chain-scission reactions
TL;DR: Etude theorique de la dynamique de the relaxation de contrainte dans un systeme dense de polymeres vivants as mentioned in this paper, e.g.
Journal ArticleDOI
Molecular recognition directed self-assembly of supramolecular liquid crystalline polymers from complementary chiral components
Journal ArticleDOI
Dynamics of Entangled Solutions of Associating Polymers
Michael Rubinstein,A. N. Semenov +1 more
TL;DR: In this article, the authors developed a theory of "sticky reptation" to model the dynamics of entangled solutions of associating polymers with many stickers per chain, which predicts a very strong concentration dependence of viscosity in good agr...