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

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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

2.7K
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...
2.7K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.2K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.2K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.4K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.4K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

2.0K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.0K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.8K
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...
2.8K
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

2.5K
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...
2.5K

You might also read

Related Articles

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

Sort by
Same author

Effects of Topological Constraints on Equilibrium Swelling of Polymer Gels.

ACS polymers Au·2026
Same author

Modeling the flow-driven disassembly and extensional rheology of end-linking telechelic polymers.

The Journal of chemical physics·2026
Same author

Elongational flow response of compressible polymer melts.

The Journal of chemical physics·2026
Same author

Learning Latent Representations to Bridge Coarse-Grained and Atomistic Resolutions in Polymer Simulations.

Journal of chemical theory and computation·2026
Same author

Shape elasticity in colloidal bent-core liquid crystals.

Soft matter·2026
Same author

From Coils to Rods: Structure and Dynamics of Polyelectrolytes in Water.

ACS macro letters·2026

Related Experiment Video

Updated: Aug 2, 2025

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.4K

Entropic Mixing of Ring/Linear Polymer Blends.

Gary S Grest1, Ting Ge2, Steven J Plimpton1

  • 1Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.

ACS Polymers Au
|April 17, 2023
PubMed
Summary
This summary is machine-generated.

Ring polymers enhance miscibility in polymer blends due to increased conformational entropy. This entropic mixing effect, quantified by a negative chi (χ), makes ring/linear blends more compatible than linear/linear or ring/ring blends.

More Related Videos

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

7.9K
Molecular Entanglement and Electrospinnability of Biopolymers
07:59

Molecular Entanglement and Electrospinnability of Biopolymers

Published on: September 3, 2014

14.8K

Related Experiment Videos

Last Updated: Aug 2, 2025

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.4K
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

7.9K
Molecular Entanglement and Electrospinnability of Biopolymers
07:59

Molecular Entanglement and Electrospinnability of Biopolymers

Published on: September 3, 2014

14.8K

Area of Science:

  • Polymer Physics
  • Materials Science
  • Computational Chemistry

Background:

  • Ring polymers exhibit compact, low-entropy conformations due to topological constraints.
  • The unique structure of ring polymers allows threading by linear polymers, increasing ring entropy.

Purpose of the Study:

  • To investigate the miscibility of ring/linear polymer blends.
  • To quantify the entropic contribution to mixing in these blends.
  • To compare miscibility with linear/linear and ring/ring blends.

Main Methods:

  • Molecular dynamics simulations using bead-spring chain models.
  • Measurement of the static structure function S(q) analogous to small-angle neutron scattering.
  • Fitting S(q) data to the random phase approximation model to determine the Flory-Huggins interaction parameter (χ).

Main Results:

  • Ring/linear blends demonstrate significantly higher miscibility than linear/linear blends.
  • An entropic mixing (negative χ) was observed for ring/linear blends, unlike linear/linear and ring/ring blends.
  • Miscibility in ring/linear blends increases with chain stiffness and is inversely related to the number of monomers between entanglements.

Conclusions:

  • The conformational entropy increase in ring polymers drives enhanced miscibility in ring/linear blends.
  • Ring/linear blends are more miscible than their linear or ring-only counterparts.
  • These blends maintain a single phase over a broader range of component repulsion.