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Related Concept Videos

Polymers02:34

Polymers

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 properties that they exhibit. Additionally,...
Polymers02:34

Polymers

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 properties that they exhibit. Additionally,...
Polymers02:34

Polymers

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 properties that they exhibit. Additionally,...
Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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...
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

Characterization of supramolecular polymers.

Yiliu Liu1, Zhiqiang Wang, Xi Zhang

  • 1Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.

Chemical Society Reviews
|June 8, 2012
PubMed
Summary

Characterizing supramolecular polymers, which self-assemble via noncovalent bonds, requires diverse techniques. Combining multiple methods is crucial for a comprehensive understanding of these dynamic materials.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Supramolecular polymers utilize noncovalent interactions for monomer assembly, leading to unique properties like reversibility and stimuli-responsiveness.
  • While novel supramolecular materials and polymerization methods are advancing, standardized characterization techniques remain underdeveloped.
  • The inherent dynamic nature of supramolecular polymers challenges conventional polymer characterization methods.

Purpose of the Study:

  • To review and summarize various characterization techniques applicable to supramolecular polymers.
  • To highlight the advantages and disadvantages of each method for analyzing supramolecular polymer structures and self-assembled states.
  • To emphasize the necessity of employing multiple techniques for robust supramolecular polymer characterization.

Main Methods:

  • Theoretical estimation and computational modeling.
  • Solution-based techniques: Size Exclusion Chromatography (SEC), viscometry, light scattering, vapor pressure osmometry.
  • Spectroscopic methods: Nuclear Magnetic Resonance (NMR) spectroscopy, mass spectrometry.
  • Microscopy and single-molecule techniques: Scanning probe microscopy (SPM), electron microscopy (EM), Atomic Force Microscopy (AFM)-based single molecule force spectroscopy.

Main Results:

  • Each characterization method offers specific insights but also possesses limitations.
  • Most techniques focus on the supramolecular polymer chain itself, while some address the self-assembled state.
  • No single method is sufficient for complete characterization; a multi-technique approach is essential.

Conclusions:

  • A combination of diverse analytical methods is indispensable for accurately characterizing supramolecular polymers.
  • Understanding the dynamic behavior and self-assembly of these polymers requires integrating data from multiple techniques.
  • This review provides a guide to selecting appropriate methods for the comprehensive analysis of supramolecular polymers.