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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Covalent Bonds01:29

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Covalent Bonds01:08

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When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
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Network Covalent Solids02:18

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Dynamic covalent polymers.

Fátima García1, Maarten M J Smulders1

  • 1Laboratory of Organic Chemistry Wageningen University Stippeneng 4 6708 WE Wageningen The Netherlands.

Journal of Polymer Science. Part A, Polymer Chemistry
|December 6, 2016
PubMed
Summary
This summary is machine-generated.

Dynamic covalent polymers offer robust, reversible materials with tunable properties. This field explores how dynamic covalent bonds create adaptable polymers for applications like self-healing and stimuli-responsive materials.

Keywords:
dynamic covalent chemistrygelsnanoparticlespolymersresponsive materialsself‐healing materials

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Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Dynamic covalent polymers integrate the stability of covalent bonds with inherent reversibility.
  • This unique combination allows for the creation of mechanically robust yet adaptable polymer-based materials.

Purpose of the Study:

  • To provide an overview of the rapidly expanding field of dynamic covalent polymers.
  • To discuss the translation of molecular-level dynamic covalent bond behavior to macroscopic polymer properties.
  • To highlight applications such as stimuli-responsive and self-healing materials.

Main Methods:

  • Classification based on the type of dynamic covalent bond utilized.
  • Categorization based on the integration of dynamic covalent bonds in the polymer's main chain versus side chain modification.
  • Focus on the chemistry of dynamic covalent bonds and their functional impact.

Main Results:

  • Dynamic covalent bonds enable the development of mechanically stable polymers that respond to external stimuli.
  • The specific chemical features of dynamic covalent bonds dictate the functionality and responsiveness of the polymer material.
  • Understanding the conditions under which dynamic behavior is manifested is crucial for material design.

Conclusions:

  • Dynamic covalent polymers represent a versatile class of materials with significant potential.
  • The strategic use of dynamic covalent chemistry allows for the engineering of advanced functional polymers.
  • Further exploration of dynamic covalent bond chemistry will drive innovation in stimuli-responsive and self-healing materials.