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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.
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...
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...

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Updated: Jun 2, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Universal cyclic polymer templates.

Ke Zhang1, Melissa A Lackey, Ying Wu

  • 1Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Journal of the American Chemical Society
|April 22, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed novel cyclic polymers using ring-expansion metathesis polymerization and click chemistry. These versatile polymers enable the creation of advanced materials like functional polymers, brushes, and gels.

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Last Updated: Jun 2, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Cyclic polymers offer unique properties compared to linear counterparts.
  • Efficient synthesis of well-defined cyclic polymers remains a challenge.

Purpose of the Study:

  • To develop novel molecular templates for creating cyclic polymers.
  • To demonstrate the versatility of these cyclic polymers for material applications.

Main Methods:

  • Ring-expansion metathesis polymerization (ROMP) was employed.
  • Click chemistry was utilized for polymer synthesis and modification.
  • Two distinct molecular templates were designed and synthesized.

Main Results:

  • Successfully synthesized two unique, universal cyclic polymer templates.
  • Demonstrated the synthesis of functional cyclic polymers.
  • Showcased the creation of cyclic polymer brushes and cyclic gels.

Conclusions:

  • The developed templates provide a versatile platform for cyclic polymer synthesis.
  • This approach enables access to a wide range of advanced polymeric materials.
  • The methodology holds significant potential for future polymer material innovation.