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Related Concept Videos

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...
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...
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,...
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...

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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Shape-changing polymer assemblies.

Robert B Grubbs1, Zhe Sun

  • 1Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA. robert.grubbs@stonybrook.edu

Chemical Society Reviews
|June 27, 2013
PubMed
Summary
This summary is machine-generated.

Researchers synthesized stimuli-sensitive polymer assemblies that change shape between micelles and vesicles. This review explores their transformation kinetics, architectural effects, and applications.

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Last Updated: May 10, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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Published on: February 7, 2017

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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

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Area of Science:

  • Polymer Science
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Amphiphilic block copolymers self-assemble into various nanostructures.
  • Stimuli-responsive polymers enable dynamic changes in assembly morphology.
  • Controlling these transformations is key for advanced material applications.

Purpose of the Study:

  • To review recent advancements in stimuli-sensitive polymorphic polymer assemblies.
  • To highlight open questions regarding shape-change kinetics and influencing factors.
  • To explore potential applications of these dynamic polymer systems.

Main Methods:

  • Synthesis of amphiphilic block copolymers with distinct hydrophilic, stimulus-responsive, and hydrophobic segments.
  • Demonstration of transformations between spherical micelles, wormlike micelles, and vesicles (polymersomes).
  • Analysis of factors influencing the rate and nature of morphological changes.

Main Results:

  • Successful construction of stimuli-sensitive polymorphic polymer assemblies.
  • Demonstrated transformations among spherical micelles, wormlike micelles, and vesicles.
  • Identified key areas for future research, including kinetics and architectural effects.

Conclusions:

  • Stimuli-sensitive polymorphic polymer assemblies offer tunable properties through controlled self-assembly.
  • Understanding the kinetics and architectural influences is crucial for harnessing their potential.
  • These systems hold promise for diverse applications in nanotechnology and beyond.