Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.1K
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...
3.1K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.1K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.1K
Micelles01:30

Micelles

364
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
364
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

2.3K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Porous Organic Polymers: From Molecular Design to Scalable Technologies.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Synthesis and Characterization of CNC/CNF/rGO Composite Films for Advanced Functional Applications.

Micromachines·2026
Same author

Mistletoe- and Mussel-Inspired Fabrication of Hierarchically Structured Protein-Cellulose Scaffolds From Biomolecular Condensates.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Binary Biobased Supramolecular Colloidal Suspensions: A Model for Sustainable Antibacterial Coatings and Soft Carrier Systems.

ACS applied bio materials·2026
Same author

Advanced internally bridged silica core-shell nanocarriers: Design and applications.

Journal of colloid and interface science·2025
Same author

Hydrophobization and anti-condensation of cellulose-based films by silanization.

International journal of biological macromolecules·2025

Related Experiment Video

Updated: May 1, 2026

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
11:42

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Published on: June 20, 2019

7.6K

Crystallinity-driven morphological ripening processes for poly(ethylene oxide)-block-polycaprolactone micelles in

Georgios Rizis1, Theo G M van de Ven, Adi Eisenberg

  • 1Department of Chemistry and Centre for Self-Assembled Chemical Structures (CSACS), McGill University, 801 Sherbrooke Street West, H3A 2K6, Montreal, Canada. theo.vandeven@mcgill.ca adi.eisenberg@mcgill.ca.

Soft Matter
|March 27, 2014
PubMed
Summary

Poly(ethylene oxide)-block-polycaprolactone) (PEO-b-PCL) spheres transform into rod-like structures in water. This morphological change, driven by crystallization, occurs rapidly once initiated, despite a slow overall transition.

More Related Videos

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

12.8K
Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
07:39

Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst

Published on: June 8, 2016

9.1K

Related Experiment Videos

Last Updated: May 1, 2026

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers
11:42

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

Published on: June 20, 2019

7.6K
Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

12.8K
Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
07:39

Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst

Published on: June 8, 2016

9.1K

Area of Science:

  • Polymer Science
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Amphiphilic block copolymers self-assemble into various nanostructures.
  • Poly(ethylene oxide)-block-polycaprolactone) (PEO-b-PCL) forms micelle-like spherical aggregates.
  • The stability and transformation of these aggregates are crucial for their applications.

Purpose of the Study:

  • To investigate the morphological transformations of PEO-b-PCL spherical aggregates.
  • To understand the role of core crystallization in these transformations.
  • To characterize the kinetics of the sphere-to-rod transition.

Main Methods:

  • Self-assembly of PEO-b-PCL copolymer chains.
  • Transmission electron microscopy (TEM) for morphological analysis.
  • Dynamic light scattering (DLS) for aggregate size and stability assessment.

Main Results:

  • Reproducible formation of spherical micelle-like aggregates.
  • Observation of a slow transformation of spheres into rod-like or ribbon-like structures in deionized water.
  • Rapid formation of individual rods from spheres once the transition initiates, with an absence of intermediate-length rods.

Conclusions:

  • Core crystallization induces morphological changes in PEO-b-PCL aggregates.
  • The sphere-to-rod transition is a complex process with distinct rapid and slow phases.
  • Understanding these transformations is key for controlling PEO-b-PCL nanostructure morphology.