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: Overview01:13

Olefin Metathesis Polymerization: Overview

2.0K
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...
2.0K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.2K
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...
3.2K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.3K
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...
2.3K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.0K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.0K
Carboxylic Acids to Methylesters: Alkylation using Diazomethane01:33

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

2.1K
Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
2.1K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K

You might also read

Related Articles

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

Sort by
Same author

Pancreatic Cancer-Derived Small Extracellular Vesicles Remodel Hepatic Pre-Metastatic Niche via Hybrid Epithelial-Mesenchymal States.

International journal of molecular sciences·2026
Same author

Development of dual acting selenium-doped hydroxyapatite nanoparticles with platinum-bisphosphonate complexes for bone cancer therapy.

RSC advances·2026
Same author

A mild colloidal strategy for controlling the morphology of reduced graphene oxide-Ag nanowire hybrids.

Nanoscale·2026
Same author

Valorization of Soybean Peel-Derived Humins for Carbon Dot (CD) Production.

Materials (Basel, Switzerland)·2025
Same author

Luminescent Alendronic Acid-Conjugated Micellar Nanostructures for Potential Application in the Bone-Targeted Delivery of Cholecalciferol.

Molecules (Basel, Switzerland)·2024
Same author

Gas-Phase Photocatalytic Coprocessing of CO<sub>2</sub> - H<sub>2</sub>O<sub>(v)</sub> to Energy Products Promoted by the n,n-Junction In<sub>2</sub>O<sub>3</sub>@g-C<sub>3</sub>N<sub>4</sub> under VIS-Light.

ChemSusChem·2024
Same journal

RETRACTED: Alshabanah et al. Elastic Nanofibrous Membranes for Medical and Personal Protection Applications: Manufacturing, Anti-COVID-19, and Anti-Colistin Resistant Bacteria Evaluation. <i>Polymers</i> 2021, <i>13</i>, 3987.

Polymers·2026
Same journal

Correction: Kang et al. Energy-Saving Electrospinning with a Concentric Teflon-Core Rod Spinneret to Create Medicated Nanofibers. <i>Polymers</i> 2020, <i>12</i>, 2421.

Polymers·2026
Same journal

Influence of Self-Adhesive Resin Composite Deep Marginal Elevation on the Sealing Ability of CAD/CAM Lithium Disilicate Glass-Ceramic Inlays: An In Vitro Study.

Polymers·2026
Same journal

Modulating Exciton Dynamics Through Fluorescent Side Group Incorporation in Benzodithiophene-Benzotriazole-Isoindigo Terpolymers.

Polymers·2026
Same journal

PLA/PBSA Biocomposites Reinforced with Tangerine Tree-Derived Agro-Industrial Waste for Rigid Packaging: Effect of Extraction Treatment on Morphology and Thermo-Mechanical Performance.

Polymers·2026
Same journal

Synergistic Coatings Based on Chitosan and <i>Eugenia caryophyllata</i> Essential Oil to Improve Postharvest Quality of <i>Capsicum chinense</i>.

Polymers·2026
See all related articles

Related Experiment Video

Updated: Jun 6, 2025

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes
09:08

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes

Published on: February 27, 2017

10.3K

Demonstrating the Efficacy of Core-Shell Silica Catalyst in Depolymerizing Polycarbonate.

Onofrio Losito1, Pasquale Pisani1, Alessia De Cataldo1,2

  • 1Chemistry Department, University of Bari Aldo Moro, Via E. Orabona 4, 70126 Bari, Italy.

Polymers
|November 27, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces novel core-shell silica catalysts for efficient polycarbonate (PC) chemical recycling. These catalysts achieve high yields of pure monomers, enabling sustainable PC material synthesis.

Keywords:
core-shell catalystdepolymerizationionic liquidspolycarbonatesilicazinc oxide

More Related Videos

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

3.2K
Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

9.5K

Related Experiment Videos

Last Updated: Jun 6, 2025

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes
09:08

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes

Published on: February 27, 2017

10.3K
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

3.2K
Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

9.5K

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Polymer Chemistry

Background:

  • Polycarbonate (PC) is a durable, high-performance plastic widely used but challenging to recycle due to its stability.
  • Current PC recycling methods like mechanical recycling and pyrolysis have limitations.
  • Chemical recycling, specifically depolymerization, offers a route to recover monomers but often requires harsh conditions or catalysts.

Purpose of the Study:

  • To investigate the efficacy of heterogeneous core-shell silica catalysts for polycarbonate depolymerization.
  • To develop a sustainable and efficient chemical recycling method for polycarbonate waste.
  • To explore novel catalysts, including core-shell Si-ILs-ZnO, for polycarbonate ammonolysis.

Main Methods:

  • Synthesis and characterization of core-shell silica catalysts (Sc(III)silicate, Si-ILs, Si-ILs-ZnO) using XRD, SEM_EDX, FT-IR, and ICP-OES.
  • Depolymerization of polycarbonate via ammonolysis and alcoholysis using oxygen and nitrogen nucleophiles under controlled conditions (60-150 °C, 12-24 h).
  • Monitoring the depolymerization process using GC/MS and GPC chromatography.

Main Results:

  • Core-shell silica catalysts demonstrated high efficacy in polycarbonate depolymerization.
  • Ammonolysis reaction achieved up to 75% yield, producing high-purity polycarbonate monomers.
  • The novel core-shell Si-ILs-ZnO catalyst showed significant potential in this application.

Conclusions:

  • Core-shell silica catalysts provide a sustainable and efficient method for polycarbonate chemical recycling.
  • Recovered monomers can be reused for synthesizing new polycarbonate materials, promoting a circular economy.
  • The study highlights the potential of heterogeneous catalysis in advancing polymer recycling technologies.