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Polymers02:34

Polymers

41.5K
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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Polymers02:34

Polymers

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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Polymers: Defining Molecular Weight01:01

Polymers: Defining Molecular Weight

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Unlike small molecules with definite molecular weights, polymers are a mixture of individual polymer chains of varying lengths, each with a unique molecular weight.  So, the molecular weight of a polymer is expressed as an average value based on the average size of the polymer chains. The two most common forms of averages used for polymers are the number average molecular weight and weight average molecular weight.
The number average molecular weight (Mn) is the summation of the number...
3.9K

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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Self-Healing in Supramolecular Polymers.

Antonella Campanella1, Diana Döhler1, Wolfgang H Binder1

  • 1Faculty of Natural Science II (Chemistry, Physics and Mathematics)Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120, Halle (Saale), Germany.

Macromolecular Rapid Communications
|January 17, 2018
PubMed
Summary
This summary is machine-generated.

This study explores how incorporating supramolecular structures into materials enables adaptation and self-healing. Molecular design is key to unlocking the potential of these advanced, repairable materials for future applications.

Keywords:
hydrogen bondsionic interactionsmetal-complexesself-healing materialssupramolecular networks

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Area of Science:

  • Material Science
  • Polymer Chemistry
  • Supramolecular Chemistry

Background:

  • Adaptation and self-healing are crucial principles in modern material science.
  • Supramolecular moieties are often integrated into materials to achieve these properties.
  • Molecular design plays a pivotal role in enabling self-healing capabilities.

Purpose of the Study:

  • To review recent advancements in self-healing materials.
  • To discuss the physicochemical principles underlying material adaptation and self-healing.
  • To highlight new material developments in this field since 2013.

Main Methods:

  • Literature review of scientific publications post-2013.
  • Analysis of physicochemical aspects of supramolecular self-healing materials.
  • Synthesis and characterization of novel self-healing material systems (implied).

Main Results:

  • Demonstration of how molecular design facilitates self-healing in materials.
  • Overview of various supramolecular strategies for achieving adaptation.
  • Identification of emerging trends and new material developments.

Conclusions:

  • Self-healing materials hold significant technological and application potential.
  • Continued research in molecular design is essential for advancing self-healing capabilities.
  • The field is rapidly evolving with new material developments.